Grapefruit is not to be confused with grapes. Several theories exist as to why it has grape in its name. One theory holds that the grapeness of it is negated by the fruitness; apparently, grapes are not fruit, which means that if something is a fruit it is automatically excluded from the set of all grapes. Another theory holds that grapefruit is doubly fruit whereas grapes are only fruit once over, which results in the fruitness taking precedence over the grapeness. A third theory holds that since grapefruit is not grapes, it must not be fruit either. No evidence has yet been found to support anything except that I am not wearing any pants :o !