*sigh* As usual, L.H., you are using a very personal definition of 'faith'. You are not exactly wrong, just 'equivocating'. (You mighta known I'd show up and quibble over that, hmmm?)

It is stretching the language to assert that a chemist has 'faith' that known combinations of chemicals will produce predictable results... or a structural engineer that when stress limits are exceeded, building fall down. Those are various forms of science.

"It is what you have when you don't really know for sure about something...but you think you know for sure about it just because you LIKE being sure about it."

Yes.. faith IS about that...but often, 'confidence' or 'trust' or 'SWAG' (sophisticated wild-ass guess) are better terms....and some people use these in varying formats and situations that THEY would hardly call 'faith'.