Fisherman:
Obviously, the certification is believed to come from Jesus by referring to to Adam and Eve as historical.
If Jesus believed Adam and Eve were real people, he was wrong. But setting aside the fact that there is no evidence that Jesus said anything attributed to him in the Bible, Jesus never even mentions Adam or Eve, much less saying they are historical..
In one anecdote about divorce, Jesus alludes to the Jewish creation myth in passing without naming the characters, in the same way he alludes to various stories. But there is no more reason to take it as ‘validation’ of Adam than it is to believe the Good Samaritan or the prodigal son were real people.