And I would add that the true scientific skeptic is completely aware of, and quite comfortable with, uncertainty. Feynman has a great speech on this as well....but my hero worship is showing. No more cut-n-paste.

PS
I do object to uncertainty being used as an excuse to accept all kinds of wild things...e.g. (I will duck and run after saying) "if science can't explain the phenomenon of sensing being stared at, then it must be a psychic force"