We have definitions for both a square and a circle. By definition, I understand that it's impossible to have a square circle. However, why does the word 'square' have to necessarily mean 'a plane figure with four equal sides'? Conceivably, the word square could have been defined as a 'round plane'? Thus making 'a square circle is metaphysically impossible' false?
I'm new to philosophy. So if this question is pathetic I apologize.
It depends complety in what definition of square and circle, do you use. If you use the standard definition of square (|x| + |y| = c) and the standard definition of circle (x^1 + y^2 = k), then it is a logical contradiction, therefore it methaphysicaly cannot exists. But if you as a example define square as any geometric shape and use the standard definition of circle, then it can exists.