[DennisP]

Maybe if I'd said "I can't imagine X therefore Y must be true," but what I said was "I can't imagine X so I think Y" which doesn't imply I know everything at all. Quite the opposite imho. It implies I could change my opinion on Y if you showed me an example of X.

In any case, apparently that plus my use of the word "not" were ill-advised, since almost everyone here misread my comment to mean the opposite of what I actually meant. One person did read it as intended, and got another person to see it that way.