Ringo writes:
Words aren't born in dictionaries.
Exactly. I like new words, and was admiring jar's creativity.
Although, on second thoughts, tentativity does sound a bit like a G. W. Bushism.
Speaking of the world's most powerful creationist brings me neatly back towards the topic. BDFoster suggests that YEC beliefs are more shakeable than his own Christian beliefs. In a sense, I agree.
Any form of religion that describes a non-existent universe is going to get shaken as we gain increasing understanding of the real thing. So, YEC's head on collision with all the sciences makes it very shakeable indeed, if that's what BDF meant.