I always thought it was rather foolish to bet against something that has already happened and which continues to happen right in front of us, but who knows...?
The City of Las Vegas is built on the assumption that large numbers of such people exist, and have money....
;-)
It's fustrating to argue this subject. I think the method you use there is the best though - pointing out that evolution no more contradicts the 2nd law than life processes do.