You will find that most evolutionists have not ever really thought about their own position; they simply take it for granted. And so it is often effective to ask a very simple, straightforward question to get an evolutionist to start thinking. For example, "which gender evolved first?” It’s a really simple question, but I don’t think there is any good answer from the evolutionist camp. Other simple challenges to evolution are: how information in DNA could possibly come about by natural processes, the apparently irreducible complexity of living creatures, and ubiquitous evidence for the youth of the world such as C-14 in allegedly ancient diamonds. These are all relatively simple lines of evidence, but they do not have a simple answer from the evolutionist camp.