Precambrian rabbits

If we ever discovered fossil rabbits in Precambrian rock layers, this could indicate a variety of things.
 * The rabbit fossil as well as the rock layers it was found in may have been incorrectly identified as Precambrian, indicating the radiometric dating methods used by geologists and paleontologists may not be as reliable as previously thought.
 * Someone may have travelled back in time and put the rabbit fossil there, indicating that future civilizations have a peculiar sense of humour.
 * Rabbits may have evolved on another planet and spread life to Earth, indicating that we evolved from an alien rabbit's germs.
 * It might just be a big hoax, indicating scientists should not be trusted too easily.