"How do you know there is n't a tiger in the bathroom ? You feel very strongly and have over-whelming evidence that there is no tiger in your bathroom ? ( You live in an urban area , there are no zoos , you do n't hear scratching or biting or the maiming of your poodle , and the water is going )"
"If you bothered to consider all of the unlikely possibilities of things that could be in various places in your house ( or all the possible explanations for the origin of the universe ) rather than just the most likely ones , you would be considering new ones for the rest of your life ."
"How do you know there is n't a tiger in the bathroom ?"
"rather than just the most likely ones , you would be considering new ones for the rest of your life ."