Plok probably has the right idea in this case, given they never actually say one of them will tell the truth - only that he's "never knowingly told a lie," which doesn't preclude him from giving information he doesn't know is wrong, or deciding to knowingly lie THIS time.
...of course, if this were the standard puzzle, the standard "which path would the other one tell me leads to certain doom?" would work. As well as the nonstandard "kneecap one of them and figure out which one is the truthteller from their reactions" featured in The Order of the Stick. XD
Comment by Guest Ryusui, added Fri, 27 Feb 2015 09:18:44 GMT