Bill Gates = { it celebrity, celebrity, rich, geek god, arch rivalry 'Mac vs PC', extreme public philanthropy, ...} Steve Jobs = { it celebrity, celebrity, ri

Bill Gates = { it celebrity, celebrity, rich, geek god, arch rivalry 'Mac vs PC', extreme public philanthropy, ...} Steve Jobs = { it celebrity, celebrity, rich, geek god, arch rivalry 'Mac vs PC', ...} Intersection = Bill Gates ∩ Steve Jobs = { it celebrity, celebrity, rich, geek god, arch rivalry 'Mac vs PC' } Difference = { extreme public philanthropy } So this difference goes hand in hand with arch rivalry 'Mac vs PC'. aka 'My penis is bigger than yours' to everyone but the subjects themselves.