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so, just in case there is a god, Im going to believe in one, no harm done.
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look up
pascal's wager
edit: i'm not commenting on God one way or the other. just saying that that's a silly reason to believe in God. It "does not account for the possibility that there is a God (or gods) who, rather than behaving as stated in certain parts of the Bible, instead rewards skepticism and punishes blind faith, or rewards honest reasoning and punishes feigned faith."
there's a bunch of other flaws in the argument listed in the wiki.