All deductions result in, and are based upon, the assumption they accurately reflect reality. Once one makes a conclusion, he uses it as an assumption upon which to base further thought. And no matter how many times you write to the contrary, a theory by definition entails a set of assumptions. Besides, it is common usage to make use of the word "theory" in a manner that deflects the meaning of "fact" or "absolute truth."
More little word games. Please restrict yourself to posts in English. I'm sure you'd love to construct another language in which a deduction is in fact an assumption, but that's not the one we're using here.
That nothing can travel faster than the speed of light is a consequence of special relativity, not an assumption. Deal with it.
No. If we are arguing seriously about formal reasoning, only assumptions are chosen based upon the hope that they accurately reflect reality.
Once one makes a conclusion, he uses it as an assumption upon which to base further thought.
No, intermediate terms are called predicates, mostly, in modern literature.
Besides, it is common usage to make use of the word "theory" in a manner that deflects the meaning of "fact" or "absolute truth."
Common usage doesn't reveal too much of a serious nature in a serious discussion about what scientists think about their occupation.