We Never Know
No Slack
It's said that only a chicken can lay a chicken egg because only the chicken produces the protein ovocleiden needed to lay a chicken egg. So.....
What came first, the chicken or the chicken egg.
In other words was it an egg that contained a chicken or was it a nonchicken that laid a chicken egg?
Now If it was an egg laid by a nonchicken without the protein ovocleiden, then it wasn't a chicken egg laid by a chicken but could be if it contained a chicken.
However if it didn't contain the protein ovocleiden, then a non-chicken couldn't lay a chicken egg that contained a chicken.
So how could it contain a chicken if only a chicken with the protein ovocleiden can lay a chicken egg?
Think it it over
What came first, the chicken or the chicken egg.
In other words was it an egg that contained a chicken or was it a nonchicken that laid a chicken egg?
Now If it was an egg laid by a nonchicken without the protein ovocleiden, then it wasn't a chicken egg laid by a chicken but could be if it contained a chicken.
However if it didn't contain the protein ovocleiden, then a non-chicken couldn't lay a chicken egg that contained a chicken.
So how could it contain a chicken if only a chicken with the protein ovocleiden can lay a chicken egg?
Think it it over