But MAGA seems to never have been anything but an empty and meaningless abstraction.
I am of the opinion that the heavy preferencing of reductionism in biology and particularly in neuroscience comes from the dearth of good "top down" explanations of phenomena. There is no good theory of conciousness, so of course the field looks to what is better understood to explain things. Whereas, it seems like reductionism is far less popular in the physical sciences, and this makes sense given they have very many good "top-down," explanations and because unifications—the explanation of disparate phenomena in terms of more general principles— seem to have been far more common over the last century than reductions. You can even see this in the goals of the fields. In physics, the goal is "grand unification," whereas in neuroscience the goal itself is generally seen as involving some sort of reduction. The idea of emergence is particularly hard to grapple with if you only understand parts relatively well, whereas if you understand the behavior of the whole better than the parts (certainly true in chemistry), the idea of emergence is not so unsettling.
And if that is so, then perspective is not an attribute of the world, but of how we say things about the world. We can rephrase things in ways that do not depend on where we are standing...."
We pick up on them, we become aware that they are there, just as we become aware that these four apples still exist -as four apples, not merely as a non-numerical bunch of fruit-, when no one is in the house.
When Moore holds up a hand and says "Here is a hand" he is performing an act, making a declaration
It depends on what you mean by "empirical claim". Direct observations are obviously corroborable, whereas claims to have experienced God are not
Why not?
Arguments for God based on personal experience are arguments to the best hypothesis.
Yes, and I'd also add that there are different generally socially accepted criteria for what counts as "best explanation" in different societies and times and milieus.
I just want to point out that these two views are not the same. You can indeed move on from inexpressibility to a demonstration or showing of what can't be expressed. But first (or conjointly) you can also say why, as Wayfarer suggests. Or would the claim be that inexpressibility itself can only be demonstrated, not justified?
↪Tom Storm It's likes the arts— leads nowhere except to novel and perhaps inspiring experiences.
This is an astute observation that most people don't seem to acknowledge anymore. Nietzsche pointed this out, correctly, that all good things in human history have been the product of bloody and gruesome events. That's not to say we should keep doing it for because of that, but it is worth acknowledging.
If Free Will is the case, and a person's thoughts and thoughts to act come into existence at one moment in time, not having any prior cause, then this is an example of spontaneous self-causation, a metaphysical problem difficult to justify.
While it’s interesting to me to note that truth in other languages can hold a somewhat different set of denotations and connotations (e.g., the Ancient Greek “alethes” meaning un-concealment or un-forgotten—to my knowledge hence not easily specifying something like “the arrow’s aim was true”), I so far do think that the English notion of truth does hold the univocal general meaning just specified: conformity to the actual, and this either as a) the process of remaining aligned to that which is actual or b) the state of being absolutely conformant and hence identical to that which is actual (such that (b) can be found to be a perfected form of (a)).
What do you mean by modern thought? Presumably you're restricting to philosophers? Anglo-American philosophers? And over what time period?
From the point of view of science and particularly of AI, and over the last 40 years I've seen things move the other way. I am quite baffled by the idea that you have somebody to argue against.
This means that a parameter value which was regarded as having a true but unknown value is now regarded as having a prior distribution which is subjective. This is away from a univocal value for the parameter and quite likely a move away from the binary {True, False} to a subjective probability distribution over [0,1].
To me this just seems like an inadequate mathematical model of some aspect of reality. You should be using a number to represent a degree of illumination, not a boolean value. If you want to consider the illumination in different parts of one room then you need a vector of numbers. Progress in science often follows this path. Here you can see the binary {male, female} being transformed into a nine dimensional entity.
When was your class?
So Aquinas talks about univocal predication and then analogical predication, and then at the end of the corpus of the article he talks about truth as it exists in intellects and truth as it exists in things. The former is univocal and the latter is analogical. But we are talking about truth as it exists in the intellect, not truth as it exists in things. It is mistaken to say that Aquinas thinks truth is analogical. Aquinas thinks that its proper nature has to do with univocal predication, "If therefore we speak of truth, as it exists in the intellect, according to its proper nature..."
You seem to think that there are no univocal predications. You seem to think that if a monkey is an animal and a dog is an animal, then we must be using "animal" analogically, because monkeys are different than dogs. This is strange.
Suppose a man wants to buy 100 pounds of potatoes. The farmer's scale is broken, but he and the farmer eyeball a cartload of potatoes and agree on a price fit for 100 pounds. The man gets home and weighs them. They weigh 98 pounds. "Close enough," he says. The claim is mostly true.
And at this point you interject and say, "See, this proves that weight is analogical, or is being predicated in an analogical manner." But it doesn't prove that.
ou seem to think, "When 'animal' is predicated of each species of animal, it is predicated analogically because each species is not identical." Or, "When 'health' is predicated of kangaroos and daffodils, it is predicated analogically, because kangaroos are not daffodils."
Of course it gets tricky when we compare uncreated truth to created truth, but I have never found it helpful on these atheistic forums to stray too far into theology. I am happy to say that truth is analogical vis-a-vis the uncreated truth of the divine intellect, but when we are talking about truth on TPF we are almost certainly not talking about that. Instead we are talking about, in Aquinas' language, the correspondence between human intellects and reality. And that (created) truth is univocal.
But see also ST I.85.5 and ST I.85.8. Aquinas certainly thinks that we understand indivisible wholes, but only through a process of composition and division. Even the act of recognizing that one's apprehension fits the reality is for Aquinas a form of combining (i.e. recognizing that one's intellectual conception is true).
I think it’s fair to say that Habermas sees rationality as procedural, and the procedure necessarily involves language.
Intellectus is the higher, so that if we call it ' understanding', the Coleridgean distinction which puts 'reason' above ' understanding' inverts the traditional order. Boethius, it will be remembered, distinguishes intelligentia from ratio; the former being enjoyed in its perfection by angels. Intellectus is that in man which approximates most nearly to angelic intelligentia; it is infact obumbrata intelligentia, clouded intelligence, or a shadow of intelligence. Its relation to reason is thus described by Aquinas: 'intellect (intelligere) is the simple (i.e. indivisible, uncompounded) grasp of an intelligible truth, whereas reasoning (ratiocinari) is the progression towards an intelligible truth by going from one understood (intellecto) point to another. The difference between them is thus like the difference between rest and motion or between possession and acquisition.
We are enjoying intellectus when we 'just see' a self-evident truth; we are exercising ratio when we proceed step by step to prove a truth which is not self-evident. A cognitive life in which all truth can be simply ' seen' would be the life of an intelligentia, an angel. A life of unmitigated ratio where nothing was simply ' seen' and all had to be proved, would presumably be impossible; for nothing can be proved if nothing is self-evident. Man's mental life is spent in laboriously connecting those frequent, but momentary, flashes of intelligentia which constitute intellectus.
When ratio is used with this precision and distinguished from intellectus, it is, I take it, very much what we mean by 'reason' today; that is, as Johnson defines it, 'The power by which man deduces one proposition from another, or proceeds from premises to consequences'.
C.S. Lewis - The Discarded Image
But, having so defined it, he gives as his first example, from Hooker, 'Reason is the director of man's will, discovering in action what is good'. There would seem to be a startling discrepancy between the example and the definition. No doubt, if A is good for its own sake, we may discover by reasoning that, since B is the means to A, therefore B would be a good thing to do. But by what sort of deduction, and from what sort of premises, could we reach the proposition 'A is good for its own sake' ?
This must be accepted from some other source before the reasoning can begin; a source which has been variously identified-with 'conscience' (conceived as the Voice of God), with some moral 'sense' or 'taste', with an emotion ('a good heart'), with the standards of one's social group, with the super-ego.Yet nearly all moralists before the eighteenth century regarded Reason as the organ of morality. The moral conflict was depicted as one between Passion and Reason, not between Passion and 'conscience', or ' duty', or ' goodness'. Prospero, in forgiving his enemies, declares that he is siding, not with his charity or mercy, but with'his nobler reason' (Tempest, v, i, 26). The explanation is that nearly all of them believed the fundamental moral maxims were intellectually grasped. If they had been using the strict medieval distinction, they would have made morality an affair not of ratio but of intellectus.
...The belief that to recognise a duty was to perceive a truth-not because you had a good heart but because you were an intellectual being-had roots in antiquity. Plato preserved the Socratic idea that morality was an affair of knowledge; bad men were bad because they did not know what was good. Aristotle, while attacking this view and giving an important place to upbringing and habituation, still made 'right reason' ( 6p6os Myos) essential to good conduct. The Stoics believed in a Natural Law which all rational men, in virtue of their rationality, saw to be binding on them. St Paul has a curious function in this story. His statement in Romans (ii. 14 sq.) that there is a law ' written in the hearts' even of Gentiles who do not know 'the law', is in full conformity with the Stoic conception, and would for centuries be so understood.
Nor, during those centuries, would the word hearts have had merely emotional associations. The Hebrew word which St Paul represents by Kap5ia would be more nearly translated ' Mind' ; and in Latin, one who is cordatus is not a man of feeling but a man of sense. But later, when fewer people thought in Latin, and the new ethics of feeling were corning into fashion, this Pauline use of hearts may well have seemed to support the novelty.
The importance of all this for our own purpose is that nearly every reference to Reason in the old poets will be in some measure misread if we have in mind only ' the power by which man deduces one proposition from another'. One of the most moving passages in Guillaume de Lorris' part of the Romance of the Rose (5813 sq.) is that where Reason, Reason the beautiful, a gracious lady,a humbled goddess, deigns to plead with the lover as a celestial mistress, a rival to his earthly love. This is frigid if Reason were only what Johnson made her. You cannot turn a calculating machine into a goddess. But Raison la bele is 'no such cold thing'. She is not even Wordsworth's personified Duty; not even-though this brings us nearer-the personified virtue of Aristotle's ode, ' for whose virgin beauty men will die' (o-O:s TIEpt, 1rap6eve, J.!Opcpas) .She is intelligentia obumbrata, the shadow of angelic naturein man. So again in Shakespeare's Lucrece we need to know fully who the 'spotted princess' (719-28) is: Tarquin' s Reason, rightful sovereign of his soul, nowmaculate.
Many references to Reason in Paradise Lost need the same gloss. It is true that we still have in our modern use of ' reasonable' a survival of the old sense, for when we complain that a selfish man is unreasonable we do not mean that he is guilty of a non sequitur or an undistributed middle. But it is far too humdrum and jejune to recall much of the old association.
Science, similarly to religion may be embedded in mythic understanding. What do you think, especially in relation to the concept of myth?
If we could ask the medieval scientist 'Why, then, do you talk as if [inanimate objects like rocks had desires]?' he might (for he was always a dialectician) retort with the counter-question, 'But do you intend your language about laws and obedience any more literally than I intend mine about kindly enclyning? Do you really believe that a falling stone is aware of a directive issued to it by some legislator and feels either a moral or a prudential obligation to conform?' We should then have to admit that both ways of expressing are metaphorical. The odd thing is that ours is the more anthropomorphic of the two. To talk as if inanimate bodies had a homing instinct is to bring them no nearer to us than the pigeons; to talk as if they could ' obey laws' is to treat them like men and even like citizens.
But though neither statement can be taken literally, it does not follow that it makes no difference which is used. On the imaginative and emotional level it makes a great difference whether, with the medievals, we project upon the universe our strivings and desires, or with the moderns, our police-system and our traffic regulations. The old language continually suggests a sort of continuity between merely physical events and our most spiritual aspirations.
The Discarded Image
Forms, then, are the very ‘whatnesses’ of things that enable them to be anything at all. Without such identities or whatnesses, without forms, there is no truth, nothing is anything, and there is no reality...
Here, then, we have Plato’s answer to the age-old question, τι τὸ ὄν, “What is being?” Being, τὸ ὄν, that which is, is εἶδος, form, the looks in things that are there to be seen by intellect and in virtue of which anything has any identity, any intelligibility, and hence any reality at all. Henceforward, not only in Plato but throughout the philosophical tradition we are considering, οὐσία will mean not simply ‘reality’ in an unspecified sense, but, more precisely, reality qua that which is intelligible. Being, as what is given to thought, consists of ‘looks,’ that is, intelligible whatnesses, identities, ideas, that show up
in varying connections and contexts, and thus lend a share of intelligibility, and hence of reality, to the world around us...
But neither is being ‘mind-independent,’ as if it were prior to and could exist without, or in separation from, intellect. There is no thought without being, but neither is there any being without thought. In order to avoid subjectivism, it is necessary, as Plotinus says, “to think being prior to intellect” (V.9.8.11–12), but this is only because in our imperfect, discursive thinking they are “divided by us” (V.9.8.20–21), whereas in truth they are“one nature” (V.9.8.17). Neither thinking nor being is prior or posterior to the other, for, just in that thinking is the apprehension of being and being is what is apprehended by thought, they are ontologically simultaneous: “Each of them [i.e., each being] is intellect and being, and the all-together is all intellect and all being, intellect in thinking establishing being, and being in being thought giving to intellect thinking and existence … These are simultaneous [ἅμα] and exist together [συνυπάρχει] and do not abandon each other, but this one is two, at once [ὁμου] intellect and being, that which thinks and that which is thought, intellect as thinking and being as that which is thought” (V.1.4.26–34).
Eric Perl - Thinking Being
Didn't I just tell you that what I am doing is expressing skepticism, and not making claims about what does and doesn't objectively exist?
I don't think it makes any sense to say that they platonistically exist in New Foundations but don't platonistically exist in ZFC. We can only take the approach of mathematical fictionalism and say that they exist according to New Foundations but not according to ZFC.
So rather I am expressing skepticism towards those who would claim mathematics is 'objectively real', and also pointing out the contradiction in the term 'mathematical platonism'.
Note that I am not saying that science shows us what is real, rather it seems to heavily suggest the existence of an underlying reality because it is able to make models of how that reality works to a degree that is at least accurate enough for our human endeavors.
The core of what I'm saying is that, as Plato argued, it is very difficult to even access the reality that underlies our world of sense experience, let alone make statements about this reality.
Sure, but he is firm that this is not truth properly speaking.
The univocal nature of truth (i.e., the state of being true) is that of conformity to some actuality—truth hence has this meaning in all cases—this either as a process of conforming to the actuality, which requires duality between that which conforms and that which is conformed to, or else as a state of being fully conformed to the actuality, which implies a nondualistic format of truth wherein there is only the law of identity (A=A) to specify the truth concerned.
While it’s interesting to me to note that truth in other languages can hold a somewhat different set of denotations and connotations (e.g., the Ancient Greek “alethes” meaning un-concealment or un-forgotten—to my knowledge hence not easily specifying something like “the arrow’s aim was true”), I so far do think that the English notion of truth does hold the univocal general meaning just specified: conformity to the actual, and this either as a) the process of remaining aligned to that which is actual or b) the state of being absolutely conformant and hence identical to that which is actual (such that (b) can be found to be a perfected form of (a)).
Aquinas explains what it would mean:
But if "adequacy of thought to being" (truth) has no clear meaning, then we're up a creek without a paddle.
And my contention is that our predication of truth cannot become analogical, for the reasons already set out above. And as I said, I don't think you will find any philosophers claiming that we should use "truth" analogically.
No it's not. Aquinas is explicitly talking about univocal predication. It does not follow that health is being predicated analogically just because health for the kangaroo and health for the daffodil are not circumstantially the same. If univocity meant such a thing then univocalists could not have common nouns at all. "...when anything is predicated of many things univocally, it is found in each of them according to its proper nature; as animal is found in each species of animal." The predicate 'health' is not species-specific, just as the predicate 'animal' is not specific to each species of animal.
But you are just speaking about truth as analogical without specifying any circumstance at all. If you think it is just certain predications that are analogical rather than the concept of truth itself, then you have to say which predications of truth are analogical and which are not.
And my contention is that our predication of truth cannot become analogical, for the reasons already set out above. And as I said, I don't think you will find any philosophers claiming that we should use "truth" analogically.
What is a basic tension in Aristotle’s affirmations concerning the relation between being and the true, i.e. the tension between the assertion that each thing is related to truth in the same way as it is to being and the assertion that being-as-true (ens ut verum) is a kind of intramental being that falls outside the science of metaphysics, is part of a synthesizing program in Anselm’s treatise De veritate, where the propositional truth, ontological truth, and moral truth are all explained, in an integrative effort, under the aegis of the basic concept of ‘rightness’ (rectitudo). Anselm’s definition was important in early attempts in the medieval doctrines of the transcendentals to relate the true that is convertible with being with the truth of the proposition. Gradually, the definition of truth as the ‘conformity of the thing with the intellect’ (adaequatio rei et intellectus) rose to hegemony, which has the advantage of making explicit the constitutive relation with the intellect, but threatens to make transcendental truth depend upon actual cognition...
The fundamental dimension of transcendental truth as an openness of being in its intelligibility to cognition, which Aquinas had identified in De ver., is also clearly expressed in Duns Scotus’ reflection on truth in his commentary on the sixth book of the Metaphysics. After having declared that all truth related to the divine intellect is studied by metaphysics, he continues to distinguish three senses in which the human mind is related to truth, of which only the first is studied by metaphysics: namely when a thing is said to be true because it is able to manifest itself to an intellect capable of perceiving it, of which Scotus explicitly says that it is convertible with being. The other senses, according to which a thing is true because it is assimilated to or known by the human intellect, fall outside the scope of metaphysics and belong to logic.
They're both tools for modeling an inferred underlying reality. But they themselves are human creations, accurate enough for our human purposes.
Neither am I, as far as I am aware
If someone were to create a gigantic effigy of a flying spaghetti monster, would that suddenly make the flying spaghetti monster real?
I don't know if I agree with your diagnosis that the opposition to Platonism arises from 'subject-object metaphysics'. I think it goes back to the decline of Aristotelian realism and the ascendancy of nominalism in late medieval Europe. From which comes the oxymoronic notion of mind-independence of the empirical domain, when whatever we know of the empirical domain is dependent on sensory perception and judgement (per Kant). Hence those objections in that passage I quoted, 'The idea of something existing “outside of space and time” makes empiricists nervous'. Anything real has to be 'out there somewhere' - otherwise it's 'in the mind'. That is the origin of subject-object metaphysics.
I think the equivocity attaches to the term 'good' rather than to the truth value, but even an assertion utilizing analogical equivocity must have a determinate and assertable form. If it doesn't then there is not any unitary thing being asserted.
The question for the equivocity of truth is this: if the first statement is not meant to be true in a univocal sense, then is it possible for the respondent to disagree with it? To agree? To even understand what is being said?
-Asytheta: truth as the conformity of thought and speech to reality (whose opposite is falsity); and
-Adiareta, truth as the grasping of a whole, apprehension (whose opposite is simply ignorance).
It is worth noting that Aquinas sees truth in a largely discursive manner:
In Ad Thalassium 60, St. Maximus the Confessor argues for the superiority of unified and direct experience, as opposed to discursive reasoning/knowing. Similarly, in Philosophiae Consolationis (4.6), Boethius argues that reason is to the intellect as time is to eternity, and what “circle” is to “center.” This is because it is “proper” for reason to be “diffused” (diffundi, i.e., scattered or spread) about many things, and then to gather from them a single cognition (i.e., unifying the “Many” into a “One”). Pseudo-Dionysius makes a similar point, (De Divinis Nominibus, 7.2) claiming that souls have rationality insofar as they “diffusedly encircle” (diffusiue circueunt) the truth of multiple existent things. Conversely, the intellect considers one simple truth and grasps the cognition of a whole multitude in it.
In proof of which we must consider that when anything is predicated of many things univocally, it is found in each of them according to its proper nature; as animal is found in each species of animal.
It is inferred that there exists our world of sense experience, and a reality underlies it. Science has gone a long way in confirming this, showing how our senses mislead us, and only show us the tip of the iceberg.
It is pretty much the central theme of Plato. It's not that reality is cleaved, but that we do not experience reality - only a reflection of it. That's the cave.
I think the word 'reality' is a misnomer here. Chess is something we made up. Would you accept it if people were arguing for the reality of the flying spaghetti monster?
Usually the non-binary response will be an attempt to distinguish different parts of the day instead of collecting it into a single whole.
But is this a matter of the univocity of truth or of the ambiguity of language? And is the LEM being rejected if the truth-value is not binary?
"I took a magnifying glass to every part of your vehicle and found a squeaky axle. Therefore I will not drive or trust it."
Okay, so how would you characterize the view you take exception to?
If I understand what you've written, you and I agree that we don't generally know the world as a bunch of propositions.
This point of view is very congenial to yours, I would think, since Rödl is doubting whether "p" -- a proposition -- could possibly do the things, all by itself, that formalism says it can. A thinker is required.
Not quite. Think of it in terms of Frege's "force" as equivalent to (one sense of) "assertion". The question is then: How does the "content" (of the force/content distinction) make itself known independently? If "p" is different from "I think p", how exactly does p come to be present to us? This quote from Rödl captures the problem:
And to say that something is not-black is to say that it is false that it is black. Something cannot be true and false, therefore the true and the false are contradictory:
Okay, that's fair, but ontological truth/falsity as they exist primarily in the intellect. I guess I didn't realize that in the OP you were talking about true/false as states of the intellect. For example, you critique a thesis regarding propositions, and seem to in some way question the LEM:
Surely we agree that "p is false" contradicts "p is true."
I know that sounds absurd, but so much depends on how we construe "assertion," and the long thread on Kimhi a few months back revealed a lot of work to be done on this question.
The monist wants to be able to say that there is no disjunction between truth and validity -- that there is something ill-formed or incoherent about "A thinks ~p", as opposed to "A doesn't think p".
In Ad Thalassium 60, St. Maximus the Confessor argues for the superiority of unified and direct experience, as opposed to discursive reasoning/knowing. Similarly, in Philosophiae Consolationis (4.6), Boethius argues that reason is to the intellect as time is to eternity, and what “circle” is to “center.” This is because it is “proper” for reason to be “diffused” (diffundi, i.e., scattered or spread) about many things, and then to gather from them a single cognition (i.e., unifying the “Many” into a “One”). Pseudo-Dionysius makes a similar point, (De Divinis Nominibus, 7.2) claiming that souls have rationality insofar as they “diffusedly encircle” (diffusiue circueunt) the truth of multiple existent things. Conversely, the intellect considers one simple truth and grasps the cognition of a whole multitude in it.
This is the problem from Parmenides that Kimhi begin T&B with, you may recall: How can we think that which is not?
Thinking cannot be dependent for its success on anything that is external to it.
So yes, the distinction you're making between contraries and contradictories is extremely important. The essential unity of the thinker with the thought, the knower with the world, can only be shown by rejecting, as Kimhi does, the idea that a proposition can be true or false in the absence of some context of assertion.
Are we sure that thought and being exist in the sort of relationship that needs to be "conformed" or "adequated"?
Can we paint a plausible picture that is at bottom monistic?
But I don't see Thomas saying that the true and the false are not contradictories, nor do I see Aristotle saying that. Classically, true/false are contradictories:
I answer that, True and false are opposed as contraries, and not, as some have said, as affirmation and negation [i.e. contradictory]. In proof of which it must be considered that negation neither asserts anything nor determines any subject, and can therefore be said of being as of not-being, for instance not-seeing or not-sitting. But privation asserts nothing, whereas it determines its subject, for it is "negation in a subject," as stated in Metaph. iv, 4: v. 27; for blindness is not said except of one whose nature it is to see. Contraries, however, both assert something and determine the subject, for blackness is a species of color. Falsity asserts something, for a thing is false, as the Philosopher says (Metaph. iv, 27), inasmuch as something is said or seems to be something that it is not, or not to be what it really is. For as truth implies an adequate apprehension of a thing, so falsity implies the contrary.
opposite assertions cannot be true at the same time” (Metaph IV 6 1011b13–20)
Perhaps you need to define what you mean by "contrary."
Claiming things are real runs into all sorts of prickly problems, though. Have you peeked beyond the veil and seen it was so?
Math is a very useful way of describing relations and ratios between things.
Hmm.. I'm inclined to say that there are indeed no objective facts related to chess. Chess tells us nothing about this underlying reality.
I'm actually kind of curious what passages of Plato this refers to.
At least according to the SEP article here, (2) is platonism:
Platonism is the view that there exist such things as abstract objects — where an abstract object is an object that does not exist in space or time and which is therefore entirely non-physical and non-mental.
Just as electrons and planets exist independently of us, so do numbers and sets. And just as statements about electrons and planets are made true or false by the objects with which they are concerned and these objects’ perfectly objective properties, so are statements about numbers and sets. Mathematical truths are therefore discovered, not invented.
I am inclined to argue that maths do not 'exist' in any objective sense.
Math is a product of the human mind, and a very useful for modeling reality for human purposes. It's a way of describing ratios and relations between things. The actual objective nature of such relations seems inaccessible to humans though.
Isn't it easier then to accept that mathematics does not exist objectively, and is simply a very useful tool conceived by the human mind?
1. Human beings exist entirely within spacetime.
2. If there exist any abstract mathematical objects, then they do not exist in spacetime. Therefore, it seems very plausible that:
3. If there exist any abstract mathematical objects, then human beings could not attain knowledge of them. Therefore,
4. If mathematical platonism is correct, then human beings could not attain mathematical knowledge.
5. Human beings have mathematical knowledge. Therefore,
6. Mathematical platonism is not correct.