theTrav wrote:Define "exist"
That shouldn't really be a joke, though. ;)
From time to time, I've seen/heard people discussing whether abstract things such as numbers or vacuum "really exist", not realizing that it is as straight forward as simply delineating their usage of the word "existence". (That is, since numbers certainly "exist" as imaginable concepts, usable in thought; but do not "exist" physically in the real world.) Of course, the problem isn't limited to just existence, but to all sorts of abstract concepts that people don't seem to grasp beyond a vague meaning of the word itself.