In the case of my father, I don't even have to ask. He just feels compelled to share his wealth of misinformation, often including a personal testimonial about his "road to Damascus" moment that "proved" to him God was real and caused him to be "born again." Very moving, except that it's not. Could lead to a talk about psychosis, though.
My dad is an episcopal priest. Over the years we've had some in depth conversations. It comes down to the emotion. He very much wants to believe. To dismiss belief to him means giving up all of the art and architecture of the Western World (an absurd position I know, but we are talking about emotional not rational arguments.)
I too am moved by some of the Christian art of the Western World but this isn't a sufficient reason to believe
thats a first for me
Religion has to have appealing art, architecture, stories and ritual to keep it going. Without it it is nothing but empty threats and more emptiness. On can fully appreciate all of it without imaginary beings. Like appreciating mythology or going to a movie knowing that it's fiction, by appreciating the makers of the art and stories therein that are human beings. All of the art and architecture of life and philosophy was created by talented human beings, some inspired by brain abnormalities, eating moldy bread, nightmares, insanity and the fear of a hell that does not exist. There is nothing wrong in giving credit where credit is due - which is to some amazing human beings - some of which you can thank personally and that is a far grander reality than any religion could ever conjure up.
The next thing that happens will not likely be a concise explanation of presumptions, limits and definitions. Does anyone ever actually ask this question? It is more the content of a major work or series of books than the answer to a question, casually posited. If anyone is asked this question it can only open a conversation on the meme scrabble that are the contents of our thoughts.
They'll answer they believe in god and he did it all like the good book sas.