Depends on what I'm trying to do.

If I make that assumption, then it follows that given enough Torture to approach its limit, I choose any number of Dust Specks rather than that amount of Torture.

If my goal is to come up with an algorithm that leads to that choice, then I've succeeded.

(I think talking about Torture and Dust Specks as terminal values is silly, but it isn't necessary for what I think you're trying to get at.)