[czr80]

The only correction I'd make to their sentence is change "showed" to "appeared to show". And his paradoxes did appear to show all those things. Of course empirically you (and the ancient Greeks) could see that they must be wrong - the challenge was to find the logical flaw in his arguments. Finding that took a very long time.

[monjaro]

Perhaps I'm being overly pedantic, but in my mind "showed" and "appeared to show" mean very different things.