The age-old question goes:
Which came first: the chicken or the egg?
And i think the point of it is that nobody really knows. Kind of like the ancient Egyptian saying, “if a tree falls in the dunes of the Sahara desert and no one hears it, did it really emit audible vibrations?” (Though the original hieroglyph looks something like a man with an axe in one hand and the other hand cupped to his ear.)
But i think there might be a solution:
A chicken, by definition, comes from an egg. Not just any egg, mind you, but a chicken egg. Thus it is impossible that the chicken came before the egg. Ergo, what laid the first chicken egg was not a chicken. That creature might indeed have been hatched from an egg, but because it cannot have been a chicken egg (as we just established), the first chicken egg still came before the first chicken.
Elementary, dear Watson!