"We know a lot of things now that Sagan didn't know" is a typical shallow and facile pseudo-sage Jack-remark from a shallow, posturing idiot. Easy enough for you to tug this stuff away from its bigger context. I wouldn't have typed that dismal line in a million years and neither would you. Jack has abundantly demonstrated in dozens of posts that he does not belong in that "we". His form of words there is puffed up and pompous. If you can't see it I can't help it.

"What in Christ's name are you on about now?" is simply a riposte to yet another thread-start coming from a man who seemed to have been going through a phase of spending about twenty obsessive hours a day hovering over his keyboard wondering what he can start a thread about as he hasn't started one for at least an hour or two. Free country, of course. The mods have allegedly told him to fight his own fights. Do allow him to do so.