Three gods puzzle (aka "The Hardest Logic Puzzle Ever", I didn't make that name up!) for reference. Try to solve the puzzle first, I've appended the text. The referenced link contains the solution.
Three gods A, B, and C are called, in no particular order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is a completely random matter. Your task is to determine the identities of A, B, and C by asking three yes-no questions; each question must be put to exactly one god. The gods understand English, but will answer all questions in their own language, in which the words for yes and no are da and ja, in some order. You do not know which word means which.
Clarifications:
It could be that some god gets asked more than one question (and hence that some god is not asked any question at all).
What the second question is, and to which god it is put, may depend on the answer to the first question. (And of course similarly for the third question.)
Whether Random speaks truly or not should be thought of as depending on the flip of a coin hidden in his brain: if the coin comes down heads, he speaks truly; if tails, falsely.
Here's my solution. Not 100% sure it works.
Nyy dhrfgvbaf ner nfxrq gb nal tbq.
Dhrfgvba 1: Vs vafgrnq bs guvf dhrfgvba, V nfxrq lbh jurgure Gehr'f nafjre gb gur dhrfgvba bs jurgure qn zrnag gehr jbhyq or gur fnzr nf Gehr'f nafjre gb gur dhrfgvba bs jurgure Gehr fng gb gur yrsg bs Snyfr, jbhyq lbhe nafjre or lbhe ynathntr'f rdhvinyrag bs gehr?
Nafjre vagrecergngvba: Vs gur nafjre vf qn, Gehr fvgf gb gur yrsg bs Snyfr. Vs gur nafjre vf an, Snyfr fvgf gb gur yrsg bs Gehr.
Dhrfgvba 2: Vs vafgrnq bs guvf dhrfgvba, V nfxrq lbh jurgure Gehr'f nafjre gb gur dhr...
P/S/A: There are single sentences which can create life-changing amounts of difference.