Probably needs to be fleshed out a bit with some background about your own views and why you're asking. Also, "what's your best reason" is a different question from "why do you accept evolution". I think the more general question is better, because probably very few people accept evolution because of a single argument or piece of evidence.
By the way, you might consider changing the title, because some of the first replies you'll get will be people saying that they don't believe evolution, they accept it.
-- | Percy |
| EvC Forum Director |