Chicken or the Egg

So which came first, the chicken or the egg? Neither. Both a rooster and a chicken came first, because without a rooster and a chicken you won't get a fertile egg. If you only have 'the chicken' then you won't get a fertile egg. If you only have an egg, then you would only end up with 'one chicken or one rooster' which would not result in what is needed to make a fertile egg (a chicken and a rooster).

So which came first "the sale" or "the marketing"? "Marketing" but it is not as complicated as a chicken.