Originally posted by karoly aczel
If I drop a brick on my foot, feel the subsequent pain, is it a fact? Bbarr?
In that case, yes, it would be a fact that you dropped a brick on your foot and felt the subsequent pain. A fact is just something that is the case; a way the world really is; a state of affairs that actually obtains; or some such.
In this context, an opinion would purport to report the facts of some matter, representing one's interpretation of the facts. But it may or may not be successful to that end. Opinion and fact are not really in the same category: opinion in this sense would take as its content propositions; these propositions in turn are not themselves facts, but they are true or false depending on the facts of the matter. So when one brings the question "Is that an opinion, or is it a fact?" against another's view, it all seems notionally confused to me on the face of it: it is an opinion that purports to report the facts, but of course it may or may not succeed in that regard.
Here are generally how I interpret some related statements:
"That is your opinion, it's not a fact!"
These kinds of statements are uttered in the heat of debate often, and they function as debate-stoppers. These statements have basically no other argumentative purpose because (1) it is just trivial that some opinion I offer is indeed my own, and it is also trivial that opinions are not themselves facts in the relevant sense and (2) but my opinion purports to report the facts, and this counter offers no actual reasons for anyone in the discussion to think any differently about anything substantive to the discussion. This statement is usually a stand-in for "Okay, on this topic I have my opinion; you have yours; they are different; and you sure as hell are not going to convince me to revise my position any time soon."
It's not my opinion, it is a fact!
This one is notionally confused on the fact of it. Like the previous one, it is also argumentatively pointless. It is usually a stand-in for "Okay, on this topic I have my opinion; you have yours; they are different; and I sure as hell am right on this, and I just do not understand how you do not get it."