I think I've finally figured out how to concisely explain to everyday people why Intelligent Design is a terrible way to figure out how and why things are the way they are in the world:

Just imagine it in a court room!

"How do you explain all this evidence against your client?"

"Well, you haven't proved it's *not* aliens! Therefore I think we should seriously consider aliens as an explanation. (Or God, I mean that works too, but let's keep talking about aliens to seem more reasonable)"