I have an assignment for both of you C-sprang-from-itself guys. Get a chicken egg from the source I specify. Write the letter 'U' on it. Hatch it. It will be a hen, because I have mad skills like that. Name the hen 'C'. When that hen is old enough to lay eggs, introduce it to a rooster and give them some privacy in whatever setting chickens find romantic. I don't know what that might be, but I think it's safe to assume it will be a space free of foxes and cats. That hen is your source. Wait for it to lay the egg from which it hatched, the one on which you already wrote 'U', you know, back before it hatched. Document your method and the results. When you manage that, get back to me with your data, sans semantic BS.