Mastodawn

Has society or scientists ever solved definitively the Chicken and the Egg theory? Or is it just like a whose on first thing?

Lemmy

The egg. The first “chicken egg” was laid by a bird that was not a chicken.

At that point the genetic difference would be too small to not call that bird some sort of chicken.

Then go one generation further back until the laying bird statisfies your “not chicken” criteria.