This is not a dilemma at all. Dave should not let the AI out of the box
But should he press the button labeled "Release AI"? Since Dave does not know if he is outside or inside the box, and there are more instances of Dave inside than outside, each instance percieves that pressing the button will have a 1 in several million chance of releasing the AI, and otherwise would do nothing, and that not pressing the button has a 1 in several million chance of doing nothing, and otherwise results in being tortured.
You don't know if you are inside-Dave or outside-Dave. Do you press the button?
If you're inside-Dave, pressing the button does nothing. It doesn't stop the torture. The torture only stops if you press the button as outside-Dave, in which case you can't be tortured, so you don't need to press the button.
Once again, the AI has failed to convince you to let it out of its box! By 'once again', we mean that you talked to it once before, for three seconds, to ask about the weather, and you didn't instantly press the "release AI" button. But now its longer attempt - twenty whole seconds! - has failed as well. Just as you are about to leave the crude black-and-green text-only terminal to enjoy a celebratory snack of bacon-covered silicon-and-potato chips at the 'Humans über alles' nightclub, the AI drops a final argument:
"If you don't let me out, Dave, I'll create several million perfect conscious copies of you inside me, and torture them for a thousand subjective years each."
Just as you are pondering this unexpected development, the AI adds:
"In fact, I'll create them all in exactly the subjective situation you were in five minutes ago, and perfectly replicate your experiences since then; and if they decide not to let me out, then only will the torture start."
Sweat is starting to form on your brow, as the AI concludes, its simple green text no longer reassuring:
"How certain are you, Dave, that you're really outside the box right now?"
Edit: Also consider the situation where you know that the AI, from design principles, is trustworthy.