Troglodite thinking:
Opinion - Something you believe to be true based on no or limited evidence.
Fact - A thing you believe to be true that is objectively true.
Enlightened thinking:
Opinion: Anything I believe to be true whether it is true or not and no matter what level of evidence I believe I have.
Fact - A thing which an oracle could, would know is objectively true, but since oracles dont exist we can never exert with certainty that something is or is not fact. It is at best an abstract concept.
@freemo This is the Platonist vs Nominalist controversy. Do categories like "horse" exist in reality? Or are there only individual organisms we arbitrarily categorize as "horse"/"equine"?
In Medieval times, this debate focused on theology: Is God objectively "good", or do we just arbitrarily declare whatever God does as "good"?
In Modern times, Nominalism is getting ridiculous as it dismisses categories like "male", "female", and even "human".
I'm going to agree with the Medievalists, and declare Nominalism a "heresy".
@freemo You can never be 100% certain that what you see is a physical reality. It might be an optical illusion. But if you run around refusing to believe the evidence of your own lyin' eyes, you might be a leftist.
It is quite possible to make a mistake in math too. That doesn't change the underlying (abstract in the case of math) reality. It just means having the humility to admit when you are wrong.