I would argue that the tulpa's inability to do anything munchkiny is evidence against their existence even in this far weaker sense.
What do you mean by munchkiny (having apparent free will separate from the host?) and how do you know they cannot?
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.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.