There’s a fairly simple answer to this question, by the way, based upon what we know about Skald, who is referring to himself in the third person for the rest of this post because he is a jackass.
In the first place, we know that it’s unlikely that Skald himself invented the Thanatos Prognosticator, as he is terribly lazy. So lazy that, though there are countless instances on this message board he could use to prove that, he can’t be arsed to find them. Whence, then, came the Prognosticator?
To answer that we must remember that Skald is in possession of a Burroughs-Libby continua device, which he also did not invent. (Otherwise it’d be called a Rhymer-continua device.) As Skald is known to be, at best, mischievous, and at worst a megalomanical monster bent on global domination during his lifetime and the extinction of humanity immediately after his death, it is further obvious that he probably stole the reality-hopper. If Skald stole and repurposed said continua device (probably [del]wiping & reprogramming[/del] raping & murdering poor Gay Deceiver in the process, sick fuck that he is), then someone else can surely steal it from him and defeat his security protocols.
Why is that important? you ask. Well, I should think that’s obvious. The Prognosticator’s functions are clearly based on certain elements of quantum theory. Thus it only works in universes in which those aspects of quantum mechanics are valid. What must be done, then, is to relocate the person who wishes to invalidate the prediction to a universe in which those rules do not hold sway.
I know what you’re thinking. “But how do I find such a universe? There’s six to the sixth power to the sixth power universes accessible through poor, violated Gay’s corpse! It’ll take forever!”
But that is foolishness. We already know of a sheaf of such universes in which both Heisenberg and Schrodinger were clearly full of shit. Moreover, it’s a safe bet that Skald has those universes bookmarked in the continua devices trans-time reality system. After all, she lives there. Shedoes too. And him, if you’re into dudes.
Clearly, the answer is to steal Skald’s stolen continua device and pop over to one of the aforementioned universes. Just stay out of any holodecks.