I have heard it used differently so often on this board that I am not sure I even remember this correctly anymore. But I always thought I had learned that facts are facts and opinions are opinions. You can have an opinion about a fact, of course. If I say, “There is no afterlife”, that is a false fact. It is incorrect. But it isn’t an opinion. If I say, “Thinking there is an afterlife is dumb” then that is an opinion.
I am repeating myself, though, so maybe I should try finding someone else’s explanation. I googled this and got the following quote from the Wise Geekwebsite.
“The difference between fact and opinion is that a fact is something that is empirically true and can be supported by evidence while an opinion is a belief that may or may not be backed up with some type of evidence. An opinion is normally a subjective statement that can be the result of an emotion or an individual interpretation of a fact. For example, biological differences between males and females are a fact while a preference for one gender over the other is opinion.”