The Chicken and the Egg
Which came first? An old conundrum, but a foolish one.
The first egg was long, long before the first chicken; and every chicken came from an egg, but not every egg came from a chicken. The process was gradual, but somewhere along the line you can say, “this was the first chicken,” and it definitely came from an egg. Ergo, the egg came before the chicken.
Of course it is possible that an egg will come from the last chicken, and highly likely that the last egg will be long after the last chicken. But that’s in the future and we don’t know, and almost certainly never will know. And anyway, we were asking which came first, not which came last.