Editing Kairos Fateweaver (section)

==Truth or Lie?==

To get a straight answer from what is effectively two creatures where one tells the truth and the other lies is tricky but doable. provided you restrict yourself to true/false questions. Karios's heads work much like the [https://en.wikipedia.org/wiki/Knights_and_Knaves Knights and Knaves] logic puzzle made famous in ''Labyrinth''. You can pick either head and, for some true/false question ''Q'', ask, "If I asked you Q, would you answer True?"

{| align="center" border="1" style="border-collapse: collapse;"
|+ Kairos's Answers
! !! You picked the Honest head. !! You picked the Lying head.
|-
! The answer to Q is actually True.
| align="center" | Yes || align="center" | No (lie)
|-
! The answer to Q is actually False.
| align="center" | No || align="center" | Yes (lie)
|}

Unfortunately we're not done. Although not explicitly confirmed in canon, which head lies and which head tells the truth will probably change with each question, unlike in Knights and Knaves, so you should not determine which head is lying for this question and then use that knowledge to change your next question. For example the Knight and Knave puzzle is often framed like '''one will lead you home the other to death''' hence why knowing which one lies is so important, if after asking the question the Knight and Knave could switch roles, then you have no way of knowing whose lying and therefore knowing which one will take you home/doom you. Asking Kairos questions for which there is no false answer, such as "If 1=2, then what is the Emperor's favorite cheese?", or no true answer, such as "How many inches do I weigh?", making him incapable of lying or telling the truth, may result in the sort of paradox that leaves you thoroughly Tzeentched.

As you can imagine attempting to outsmart an insane, immortal, all-knowing daemon isn't the best of ideas. Unless Kairos is fully compelled to answer you truthfully (like in the case of Lorgar); he might just flip the table and turn you into a [[Chaos Spawn|gribbly mess of mutated flesh]] as his way of refusing to put up with your shit. In fact, since Kairos has already seen the past and future it's highly likely he has already foreseen your attempts at trying to get a straight answer out of him and prepared his answers beforehand. Thus, Kairos is less "knights and knaves" and more "Hardest logic puzzle ever by George Boolos". In addition to one liar and one truth-teller, add in a random element (traditionally a third character who answers at random, and who is indistinguishable from the others aside from his answers; in Kairos's case, he probably swaps heads), and add onto that they deliberately answer in a language you don't speak (The three gods riddle), and of course they not only know exactly what kind of question you're going to ask but will also make sure that both their responses sound perfectly true with no way to tell which one is false, and further add that if they don't like your question they are going to kill you. [[Zero Punctuation|And then laugh. And then display your corpse at the museum of failure wearing a silly hat.]]

Basically the only way to get an answer out of him IF you have a way of phrasing the questioning such that you bypass the whole which head lies and which tells the truth thing, is if you are strong enough to compel him to answer your question... and in 40k the number of characters that can do that are on a very short list, which spoiler: you are not on.

In fact the only way to get useful information out of him is to winnow a massive pool of data down to two. If you ask him "what planet in the galaxy is my macguffin" he will only give back 2 answers out of the entire galaxy, one wrong planet and one correct one. He is going to fuck with you of course but now you know you have a 50% chance to be right, and if you're powerful enough to summon a greater Demon, you can figure the rest out.