The egg… laid by a bird that wasn’t a chicken

Neil D Tyson

The explanation goes as follows:

Since any offspring is never going to be 100% genetically similar to its parent, eventually an offsprings genome will mutate into what we humans would classify as a chicken within our “scientific” definitions.

Imo the concept of a chicken is an illusion. It’s a bird thing that I can eat, and sometimes they’re really nice and lay eggs, that’s what a chicken is.