While thinking about this article, I came upon this great essay by Isaac Asimov: The Relativity of Wrong

It's a reply to an English Lit major who thinks there can be no true knowledge because, as history shows, every theory in every century was proven wrong. Therefore, our current theories must also be wrong.

Asimov goes on to show this way of thinking -- in absolutes rights and wrongs -- is inadequate. Indeed, for Asimov, right and wrong are in a continuum, with varying degrees of rightness and wrongness. For instance:

You can see what I mean as soon as you admit that right and wrong are relative. How do you spell "sugar?" Suppose Alice spells it p-q-z-z-f and Genevieve spells it s-h-u-g-e-r. Both are wrong, but is there any doubt that Alice is wronger than Genevieve?

Good read.