I got into this argument with one of my uncles a while back. It went something like this, as I recall:
Uncle B - Creationism should be taught in science class. Alternative ideas should be presented.
Alex B - Ridiculous! Creationism isn't a science. It's fine if you want to have some philosophy class or something, but keep it out of science.
Uncle B - Intelligent Design is a science! *points to some creationist website with a dubious argument about the probability of life forming by accident* Math!
Alex B - *unsure of where to even start* Er, but, besides the law of large numbers proving that wrong, that site is premised on this other guy's book, which has been roundly ripped to shreds by evolutionary scientists. Either way, evolution isn't even about the origin of life. It's just about how that life split into all the species we have today and how it changes over time.
Uncle B - Where's the proof for evolution? Darwin couldn't account for variation!
Alex B - You're basing all your arguments on a book that's a couple of centuries old! They constantly find new evidence to plug in the gaps that Darwin couldn't.
Uncle B - What about the Cambrian Explosion? They haven't explained that.
Alex B - That "explosion" lasted tens of millions of years, and the only thing significant is that all these creatures developed hard shells and left more evidence that they existed.
Uncle B - So that's the proof? A bunch of old bones and dirt?
Alex B - Yes!
Uncle B - Well I just don't believe it.
Alex B - Well there we go.
Uncle B - See you at Christmas. I'll bring the zombies game.