Some zebras decided to ask a wise owl if they were black with white stripes or white with black stripes but the owl merely replied you are what you are.
Confused, zebra1 asked zebra2 other what that meant.
zebra2: it means we're white with black stripes
zebra1: how do you know?
zebra2: cos if we were black with white stripes the owl would have said yo is what yo is.