There is a relativity of right, as well, and I think Isaac is referring to that, too. Yes, there is truth, but never absolute truth. Science is not ideology. It is not religion.

The angry man who wrote Asimov is a very common archetype in these turbulent times. He's the one that goes over all the facts with a very fine tooth comb until he finds one little thing that doesn't quite match up, and then he feels justified in rejecting everything outright.

"Aha! Gotcha! There's all the proof I needed to prove you're wrong, and if you're wrong about this, you're wrong about everything, and you're wrong forever. Wrong, wrong, wrong. So I must be right. Perfectly right. All the time and forever and ever."

This kind of personality is becoming more and more common, now that the Internet is giving them the means to quickly accumulate all the factoids they need to justify their preconceptions, and cloak them in a veil of scholarship and legitimacy.