Checking my facts before hitting send does not make me a expert.

And that doesn't include reading the New Scientist every week obviously. But hey! The response could have asked "where does the information come from?" But (mae culpa) someone's narcissism button was duly pressed and the eruption duly delivered. Is prodding our "PhD on everything (majoring in twitchy opinionates)" really a sport for intelligent people?

Of course we could have, and did, ask our own tame PhD Geologist, a Brother-inLaw, but hey! How much information do you need to silence a know-it-all? And is it possible?