Why don't you go to the bottom of the garden and search for faries?
Because there is no good reason for believing in faries in the first place.
I'm open to faries being real, as I am to a god being real. But with just as much reason for believing in either, I don't go 'searching' for it. The reason I lump all the different gods together is because there is no more reason to believe in one over another. If there were, everyone would believe in one god.
If I really were close minded, I wouldn't answer challenges to my atheism. I do go out of my way to try and answer every point, such as 'How did humans get here?' 'Where do you get your morals from?' 'What have you got to lose by believing?' I go through it all, but I've found that even after giving the answers, there'll be another question to try and stumble me, rather than people saying 'Yes, that's not a good reason to believe in a god, I won't use that one again with anyone, otherwise it would be like trying to trick them.'
On the other hand, even after going over this with people, I hear a very close minded statement most of the time from them. "Well okay, even if there is no good reason to believe in a god, I have faith and that's that." The ultimate form of close mindedness is when no information can make any difference to your beliefs. My beliefs are open to change, and if someone ever provides a good reason for believing in a god, I will. It's as simple as that.