There were supposed to be 15 commandments, but Moses accidentally dropped and broke a tablet. What are some of the five missing commandments?
And I know we're mostly atheists here, but please keep the theological discussion to a minimum and appreciate the lighthearted hypothetical scenario for what it is.
Thou shalt not claim intentions to defend thine or someone else's actions.
Thou shalt not convey "I disagree" through feigned lack of understanding.
Bonus: the original version of the 8th was
Thou shalt not claim with certainty things that you do not know for certain.
The current 8th (Thou shalt not bear false witness against thy neighbour) is a forgery. Some assumer got called out over and over because of the older 8th, since he really liked to make shit up, so he restricted it into near uselessness. Source: I'm Lucifer, I know it. :^)
Your version of the 8th would literally undo all religion
It would undo the myths, I think. Morality and religious practices might survive depending on how much they rely on said myths.
and a bit of science
It would perhaps demote a lot of theories back to hypotheses, but that's actually good IMO. A good scientist should embrace the doubt and treat it as a respectable enemy, not hide from it like a catfish in the mud.