[DittoJed2]

I have no idea what mechanism just as scientists have no idea what mechanism limits genetic mutations today. Theologically, God built things so that they would stay confined to a certain amount of change, no more. It's called order, and he really did not appreciate when man would lie with some other species (as in the imaginary part ape-man).

[Ichneumon]

I have no idea what mechanism

And yet you claim there *is* one. What specific evidence do you have for that?

just as scientists have no idea what mechanism limits genetic mutations today.

You are mistaken. Scientists do know what "mechanism[s] limits genetic mutations". They also know that there is no mechanism which prevents mutations from accumulating beyond a certain "limit".