Here is another example, this one from psychologist Thomas Gilovich: A husband believes he always puts down the toilet seat. His wife, with whom he shares a bathroom, believes he never puts down the seat. They are working from the exact same set of data but arrive at opposite conclusions. Why? Well, the husband notices when he remembers to put down the seat. The wife notices when he doesn’t. He doesn’t notice when he forgets (because that’s what it means to forget). She doesn’t notice when he does, because it’s a nonevent.
