Intelligence is learning to avoid using childish cliches, unless your intention was to mislead. Categorisation and understanding dependencies are hard enough problems already.
At the supermarket or taxation (Nix v. Hedden) tomatoes are a vegetable.
Interestingly, the Bible does not specify what kind of fruit was on the Tree of Knowledge. The association between the forbidden fruit and an apple was a derivative of later translations.
Imagine the consternation if the claim had become Adam and Eve ate of the forbidden tomato. Then this incessant controversy regarding the tomato's status would take on a biblical dimension... though then perhaps the Mormon claim that the Garden of Eden is to be found in the New World would actually have some credibility. Indeed, answers to some questions are not a matter of intelligence at all. Sometimes it seems to me intelligence is more about knowing what questions to ask in the first place.