Quote:how, pray tell Min, do you detect Christians from atheists?
Basically, just listen to them for a little while. They will let it slip. Theists almost cannot control themselves. Sooner or later they'll give you one of these "god bless" or "jesus this or that" or some other such routine. The speed with which they introduce their fairy tales into the conversation gives you an idea of the degree of fanaticism. The system is not perfect but I have generally found it to work.
Of course, if they are standing there with a big fucking cross or yamulke or whatever that is a pretty good hint, too.