Before science there were humans that perceived blue things. Before geometry there were humans that perceived equi-sided formations. — Mww
Agree.
Even if we can say truthfully the scientific or geometric properties resided in the objects before we knew of them, we can truthfully only say so after the discovery of it. — Mww
No, because that erroneously rules out speaking unconfirmed truths. If I knew enough to make a prediction or a guess about the properties of blue objects or geometric shapes, then I could speak unconfirmed truths about them. For example, if I knew that the colour blue consists in visible light from within a certain range of wavelength, and I knew that we could measure wavelengths in nanometres, then I could make a complete guess and say that the colour blue has a range of between 450 and 495 nanometres, and if I said that, then I would be speaking a truth prior to the discovery of that fact.
But if I didn't know enough to make a prediction or guess of that sort, then yes, I wouldn't be able to truthfully say stuff like that. But so what? How is that supposedly relevant?
Unconfirmed truths are important in this context, because that, in combination with other things, enables me to reasonably say that there would exist a rock if we all died, and, in my argument with you-know-who, that it could be the case that there's a rock that's 10cm in length, despite it not having been measured.
So you've fallen prey to his kind of illogic, have you? I thought that you were better than that.
Blue things were blue long before wavelengths and frequencies were determinable, or even practically necessary. Square things were square long before geometers determined what it means to be square. — Mww
This is a misuse of "determine", another error which
Metaphysician Undercover has made prior to you making it. If you want to say it right, then you should use "discover" instead. The properties of a thing are what determines what it is. If a segment of visible light has the properties required for being blue, then it's blue. If a shape has the properties required for being a square, then it's a square. That's what determines. If I don't know that, then I haven't discovered it. And if I want to discover it, and I think I know how, then that's what I'll have to do in order to find out.
Because these things were perceived beforehand, the specific properties for these things are not required for them to be understood. — Mww
To what extent?! Obviously lacking knowledge of subsequent discoveries means that they didn't understand them to the extent that we do.
That is the same as saying the real parts of these things are not required for the understanding of them, for the knowing of them for what they are merely by means of their appearance. — Mww
That's a load of rubbish. If I only knew of the appearance of the colour blue, then I would only have an incomplete understanding. I wouldn't understand that the colour blue is visible light within a certain range of wavelength.
A gal who wants a shade of blue for the nursery doesn’t give a crap about the frequency of it, and the guy setting tile in the hallway doesn’t give a crap about the fact of four equal angles, but both of them know what they want from each of those things, have an expectation from these things because of their appearance and NOT from their respective properties. — Mww
But I don't give a crap about knowledge for limited practical purposes in this context. I've explained the irrelevance of this before, yet here you are bringing it up again, as though it were otherwise. This discussion is about knowledge and truth. It is not confined to your agenda of what's practical! If you want to talk about what's practical, then create a separate discussion! This isn't something that's going to change over time for no apparent reason, so please try to remember the appropriate context.
There is no suspicion in claiming to be a realist, the negation of which is absurd, but the denial of idealism which necessarily accompanies it, is highly suspicious. As long as an otherwise normally functioning human thinks, he is an idealist of some kind. Simply knowing something about blue and squares and all the rest, that cannot be derived, nor does not need to be derived, from its physical properties presupposes a source of knowledge having nothing to do with the empirical realism, that being merely the occassion. — Mww
What? That's a load of nonsense. I'm not an idealist. And knowing something about things like the colour blue, like how it appears, without knowing the science, is completely irrelevant. Okay, people can know some stuff about some stuff without knowing everything about that stuff. Okay, people can know enough for practical purposes. I never denied that, but I certainly deny the relevance of you bringing that up in this context.