Actually, they're both
A fruit can be a vegetable, but a vegetable cannot be a fruit
(
Mrs Trellis GIN,
Thu 6 Aug 2009, 14:03,
archived)
according to the saying...
Knowledge means knowing a tomato is a fruit
Wisdom means not putting it in a fruit salad.
(
turtles head is touching cloth poked a dwarf on the forehead at,
Sat 8 Aug 2009, 17:24,
archived)