The
chicken or the egg causality dilemma is commonly stated as "which came first: the
chicken or the
egg?". The dilemma stems from the observation that all chickens hatch from eggs and all chicken eggs are laid by chickens. "Chicken-and-egg" is a metaphoric adjective describing situations where it is not clear which of two events should be considered the
cause and which should be considered the
effect.
[1]
furthermore
Although the question is typically used metaphorically, literal answers have been formulated for whether the chicken or egg came first.
If the question refers to eggs in general, the egg came first, as the first egg-laying animals evolved millions of years prior to birds.
[2] If the question refers to
chicken eggs specifically, the answer is again the egg, but theexplanation is more complicated. An animal nearly identical to the modern chicken (i.e., a
proto-chicken) laid a fertilized egg that had DNA identical to the modern chicken (due to mutations in the mother's ovum, the father's sperm, or the fertilised
zygote).
[3][4] Put more simply by
Neil deGrasse Tyson: "Which came first: the chicken or the egg? The egg – laid by a bird that was not a chicken."
[5]
Of course, it might be argued that it is not actually a "chicken egg" if the egg of the proto-chicken was demonstrably different than a true chicken egg. In that case, the fetus with the chicken DNA would be developing inside a proto-chicken egg, thereby making theemergent chicken "first".
Source: wiki
MY answer is, Carl Yung
