[BenLurkin]

If I drop my pencil it will fall to the floor. That is a fact. How gravity works is still a theory.

The human body can be studied factually and healed through an application of that factual study. How we came to be humans is either a matter of theory or faith, or both.

"Intelligent deisgn" is probably no more or less fanciful a theory than is the theory of evolution.

[Junior]

Once again, the word "fact" never enters into it. Researchers "observe" the human body (or whatever they are studying) and make "theories" to explain those observations.

[jlogajan]

If I drop my pencil it will fall to the floor. That is a fact.

It would seem so -- but alas. Are you only dreaming? Are you under the influence of mind altering drugs? Are you insane? Have you misremembered a suggestion as an actual occurance you witnessed. All these are possible explanations for your "observation" that change it from "fact" to imagination.

You can say there is a line between "fact" and "theory" but it is going to be arbitrary. In reality, everything we believe is a theory. We self-assign more confidence to some theories than others.

[cinFLA]

If I drop my pencil it will fall to the floor. That is a fact.

Not a certainty, just a very high probability that it will ....