The States in which God Exists
Let me help you out here. There is either a platypus, a piece of lint, or nothing in your pocket. It's equal odds (of course), but there's now only a 33% chance of there being a platypus in your pocket. Better? — SophistiCat
No, that is not any better, if you say one of these in my pocket and the other two are not. Either a platypus or a piece of lint or nothing.
Then you have three possible scenarios:
You have a platypus, but not a piece of lint.
You have a piece of lint but not the platypus.
You have nothing.
This is where the common misconception of probability is, because each scenario does not have a 33% chance of being in you pocket. One of them is 100% true and the other two are 0% true.
Now I may take a guess but then it is my guess that has the % chance of being right. For example if you rolled a 3 sided die earlier in the morning to pick which to put in your pocket then I could maybe say my guess has a 33% chance of being right. But the chance applies to my guess, not the contents of your pocket. However, there could be confounding variables which compel me to guess one way over the others so not really a 33% chance. I might have a fondness for lint which could cause me to guess lint more often than the other two.
However, if you did not apply equal probability to determine the contents of your pocket then the actual % chance of my guess being right is unknown because I don't know what confounding variables influence your pocket contents form day to day. I would need some type of random sampling procedure to come up with a predictor.