i think it would be good to know what would it take for a atheist to convert to a theist a theist to convert to a atheist.
what would convert me on the spot would be
a manifestation of a god if i am sure i am its not a trick of the mind or a hallucination if he comes i will convert. (wheres a talking burning bush when you need one)
no other exsplenation possible
aliens who belive in the exsact same religion
miracles like atheists getting struck by lightning more often, or theists recovering more often than atheist from fatal injuries
indisputable prophecies coming true (selfforfilling, one in a 100, trivial and vague do not count)
knowledge that was not available at the time if a passage of the bible would say moses i say to you your energy is your mass times the speed of light multiplied upon itself i would convert
i think by now you get the idea im more interested what would it take for a theist to convert to atheism or a another theism