Full Idea
If flutes playing tunes were to grow on olive trees, would you not infer that the olive must have some knowledge of the flute?
Gist of Idea
If tuneful flutes grew on olive trees, you would assume the olive had some knowledge of the flute
Source
Zeno (Citium) (fragments/reports [c.294 BCE]), quoted by M. Tullius Cicero - On the Nature of the Gods ('De natura deorum') II.22
Book Reference
Cicero: 'The Nature of the Gods', ed/tr. McGregor,Horace [Penguin 1972], p.132