An Irish farmer had two horses and couldn’t tell them apart… …so they tied a ribbon to one of the horses and for a time, they could tell them apart.
But then the horse pulled off the ribbon, so then they shaved the mane of one of the horses and for a time, they could tell them apart.
But then the mane grew back, so then they cut the tail off of one of the horses and for a time, they could tell them apart.
But then the tail grew back.
So finally, they measured, and they found the white horse was 6 inches taller than the black horse.