Well you can say you don't think someone has a logical answer, but if they provide a logical answer, that would make you wrong. Just because something is logical doesn't mean it is true. Which is why two people can come to two different conclusions, why both of them being logical. Especially, in a topic like this where there are so many levels of understanding to it.

Christians become atheists, and atheists become Christians. Some people bounce back and forth between them as they learn more and experience life. A reasonable person could logically come to either conclusion, without being delusional or stupid or anything.