[Elsie]

But according to the Bible, we only have 3 humans alive at that moment.

No; the bible does NOT 'say' that.

It only mentions those.

Absence of evidence is NOT evidence of absence.

[ronnietherocket3]

First, I am rejecting Biblical literalism. Second, who else has been born at that point. Up until that point, only 4 humans are mentioned, one was killed.