So I was thinking about this earlier, and it seems to me that, in the question of whether or not creationism is a viable scientific field of study, despite Bill Nye's very good, factual answers, it was Ken Ham the creationist who delivered the decisive blow in the debate. Alas, for young earth creationists, it was against Ken Ham.
When asked what would change their minds, Ken Ham's response was, in effect, "nothing". "Well, I'm a Christian," he explained. And that was indeed explanation enough: evidence does not and cannot trump belief. By contrast, Nye responded with "evidence".
That, ladies and gentlemen, is the difference, the only answer you will ever need to "is creationism science?" Scientists reshape ideas to fit evidence, not the other way around. Nye responded as a scientist. Ham responded as a zealot. Ham has every right to be as zealous and as closed-minded as he likes. But that is not science. It is a direct rejection of science and rational thinking.
So I would say that Ken Ham, even more than Bill Nye, delivered the decisive answer in last night's debate: no, creationism is not science. It is a belief system based on a literal reading of select parts of a scientifically inaccurate book. Nothing less and certainly nothing more.