DNA Proves Existence of a Designer

[Angrboda]

If Quran is correct about what, Mystic?  The only thing that counts is being correct in the matter of whether certainty is an indication of truth, the very issue at stake.  Assuming it is would be begging the question.  Assuming the Quran is correct in all things would also be begging the question.  And the Quran is incorrect on some things, as well as being incomplete.  So, no, that argument doesn't hold.  In addition to being an indicator that it is bad advice on its own terms because the Quran is wrong on some things.

It's psychological advice for people who are certain. Was not meant to be an argument in itself.

Meaning what, Mystic? That it's good advice because it's psychological? What does that even mean. All advice is in some sense psychological, does that make all advice good advice? What do you mean by psychological? That it appeals to things other than reason and logic? If it does, then it is most likely bad advice.