I was taking a statement from this great-grandparent post and surrounding posts at face value

If domain experts say that the obvious ways to exploit having a tulpa fail, they are probably right.

By "do something munchkiny", I meant these "obvious ways to exploit having a tulpa", presumably including remembering things you don't and other cognitive enhancements.

Why do I think they can't? Because the (hypothetical?) domain experts say so.