The argument from authority ...

... remains unscientific: Uncertainty. (Hat tip, Dave Lull.)

Argument and puzzlement are not, of course, things that professional communicators of science like very much. They like science stories to be black and white, cut and dried, and concentrate on undisputed facts, advertising great discoveries while minimizing the years of effort and false starts needed to get there. But real science doesn’t work like that – it depends on creativity, questioning, and excursions into the unknown – an intuitive grasp of the fantastic.

Read the whole thing - carefully. It's excellent.
I think we would all do well to cultivate a greater sense of uncertainty. Too many of us tend to be more certain of many things than one ought to be of just about anything.