Proto-Chickens And Mutations?
A long time ago people say there was a chicken-like bird. It was genetically close to a chicken but wasn't a full-blown chicken yet. This ancestor of the chicken can be called the proto-chicken.
So proto-hen laid an egg, and proto-rooster fertilised it. But when the genes from the parents almost-chicken fused, they combined in a new way, creating a mutation that accidentally made the baby different from its parent. I guess this is the most probably as mutations constantly create new strains of organisms.
All Depends On How We Define Each Term
There was most likely no purpose in time where a chicken or (proto-chicken) could not mate with its parents. It might not be able to mate with its more remote ancestors (i.e. remote in time, lie a great-great-great-great-grandparent). However, they'd most likely all be long dead anyway.
No two living chickens are entirely identical. Therefore the definition of 'chicken' is fuzzy. That fogginess means whether or not an ancestor could be a chicken or a proto-chicken depends on the main points of how you frame your definition of (or criteria of) chickenhood, which is arbitrary - i.e. it is a matter of agreed convention and convenience, not of 'fact'.
At some purpose, a beast that does not count as a chicken can lay an egg that hatches into one thing that does count as a chicken however at what purpose that happens is depends on the main points of the definition of 'chicken' you would like to use.
What Are Your Thoughts?
Once you have got chosen the criterion for what you settle for as a chicken and what's a proto-chicken, then you'll get a certain answer however a unique alternative of a rule can cause a unique answer.
If you frame a certain, unambiguous definition of what is and what's not a chicken, then you'll have the primary chicken, and establish the non-chicken that set an egg that hatched into the primary chicken.
But there's no single definition of the term chicken written into the laws of the universe. You'll outline it concerning its breeding capabilities. However, that is a rule we decide, not forced on us by physical laws.
It's infinite regression something else, we all begin out as one cell, however, do cells grasp what to become? Isaw a documentary on chaos theory and they talked regarding it a little