Isaac Asimov's argument on the relativity of wrong

Here's a link to an argument that Isaac Asimov, one of the best authors of Science Fiction works, put up to a mail he received from an English Literature student who said Asimov ought to be wise and admit he doesn't know much; because Socrates said only the wisest know that they knows nothing.

He argues about the idea of the 'wrong' and against the claim that every century scientists have made discoveries and had thought of them to be right, only to be proven 'wrong' by newer discoveries.

Click here to read.