[longshadow]

Assuming that the words "circle" and "square" have a specific meaning, what is propposed (a circular square) is this: Can there be an "A" which is also -- at the same time -- not an "A".

You made an implicit assumption (which happens to not be true) in your argument.

I'll give you a few moments to think about it.... and if you sneak a peak at my other replies, you may spot it.

[PatrickHenry]

You made an implicit assumption (which happens to not be true) in your argument.

Yes, I'm assuming that no circle is a square, and therefore a circle is a "not-square", and vice versa. Perhaps it's because I've led a sheltered Euclidian life, but I believe that assumption to be true.