Originally posted by rwingett
That's a little different. You could disprove that a tangible thing exists at a specific location. But you can't prove, for example, that invisible pink unicorns do not exist somewhere. Or magic elves. Or god. You cannot disprove the existence of these things. But the point is that you don't need to. It is incumbent upon the person making the claim to provi ...[text shortened]... ot prove his claim false. But the claim can safely be treated as though it were false.
The idea of the example was to choose something that could not be disproved (practically), but was clearly false.
Let's take invisible unicorns, though, which may be better.
Are you really saying that you don't believe the statement...
"Invisible unicorns exist"
...is false? Cos I do.
I would categorise people in this way.
Firstly, those who believe the statement "God exists" has meaning - of which some say it is true (theists), some that it is false (atheists), and some that it cannot be determined whether it is true or false (agnostics).
Then there are those who believe the statement "God exists" has no meaning. Thus the question whether it is true or false simple cannot arise. It would be like asking whether "Babababababa" is true or false.
There may be a third category, i.e. those who believe we cannot determine whether "God exists" has meaning. God only knows what we'd call them.