Your in a library with three men (guy one, guy two, guy three). One always tells the truth, one always lies, and one randomly lies or tells the truth. You can ask three questions, but only one of them can answer a question. What are the three questions and reasoning that tells you which guy is which?

My philosophy teacher said we got a automatic A in the class if we answer this right, as long as we dont ask his son for the answer. As far as I know, none of you are his son. And if you are, dont tell me so.

Thoughts?

I already found the answer but i know you guys will figure it out without cheating.

Found? You went and looked it up?

Iz HATE theese Kind O riddles never seen it as a 3some tho usely it's just 2 guys? Oh well same formula PIsst ..Go watch LABYRINTH or Dr.WHO and the Three Pyamids of Mars ..This kind of Riddle trap is very common ,just confusing ..

which came first, the chicken or the egg? LOL

yes,atleast i think that's what you've been looking for.

Of three men, one always tells the truth, one always tells lies, and one answers "yes" or "no" randomly. Each man knows which one each of the others are. You may ask three yes/no questions, each of which may only be answered by one of the three men, after which you must be able to identify which man is which. How can you do it?

solution:


There are six possible scenarios. Let's call the first man A, the second man B, and the third man C. The six scenarios, then, are:

Scenario A..........B..........C
I Truthteller.....Liar.....Random Man
II Truthteller.....Random Man.....Liar
III Liar.....Truthteller.....Random Man
V Liar.....Random Man.....Truthteller
IV Random Man.....Truthteller.....Liar
VI Random Man.....Liar.....Truthteller

Follow these steps to determine which possibility listed above is correct:

1. Ask A, "Is B more likely to tell the truth than C?"
   • If yes, go to step 2.
   • If no, go to step 5.
2. Ask C, "Are you the random man?"
   
   • If yes, go to step 3.
   • If no, go to step 4.
3. Ask C, "Is A the truthteller?"
   
   • If yes, then scenario V is the case.
   • If no, then scenario II is the case.
4. Ask C, "Is A the liar?"
   
   • If yes, then scenario IV is the case.
   • If no, then scenario VI is the case.
5. Ask B, "Are you the random man?"
   
   • If yes, go to step 6.
   • If no, go to step 7.
6. Ask B, "Is A the truthteller?"
   
   • If yes, then scenario VI is the case.
   • If no, then scenario I is the case.
7. Ask B, "Is A the liar?"
   
   • If yes, then scenario III is the case.
   • If no, then scenario V is the case.

By following the steps above, you will only ever ask three questions in all, and the answers will determine the identities of the three men.



http://rinkworks.com/brainfood/s/wd.39.shtml

GODDAMMIT!!!!!!!!!!!!! i've been sittin' here for like 2 and a hald hrs tryin' to figure this out....now, i'm a philosophy major, but i didn't really dabble into ANALYTICAL PHILOSOPHY.....so i've been rackin' my brain with this question.....and dammit!!!!!!!!! i came up with some of this same shit.....even callin' 'em MAN A, B, C....lol.....but yeah, thatz how i was tryin' to figure it out.....but i couldn't figure out how to solve it.....

jesus christ.......

this shits fun.....

but i was going along the lines of:

Are You In A Library?
only the truth guy (GUY 1) and random guy (GUY 3 ) could say yes....only the liar (Guy 2) and the random guy (GUY 3 ) could say no.....

Do You Lie?
only the the random guy (GUY 3 ) could say yes.......but all three of 'em could say no.....

If, AND ONLY IF, you never lie, you must say "yes, i'm in a library".......?
only the truthful guy (GUY 1) could say yes........only the liar (GUY 2) and the random guy (GUY 3 ) could say no......

but that logic failed......because if someone said no to question 2, then who said no to question 3?

so i tried.....

Are You in A Library?

Did He Lie?

Do You lie?

again, logic failed....

so i tried:

Are You in a library?

Did he lie?

Do you ever lie?

..............i could wrap my brain around it!!!!!!!!!!!!!! pissed me off it did......

i even cracked out an old deductive/inductive-logic book of mine, tryin' to figure this out.....and it was drivin' me nuts.....but in my defense (as i have a B.A. in philosophy) i'm more atoned with continental philosophy rather than analytical philosophy.....but thank you FLOWERS as this was drivin' me in-fuckin'-sane......GAH!!!!!

Hahahaha. I would have preferred you hadnt looked up the answer. I was going more for a discussion based thread before someone went and looked up the answer. I could have done that. But thank you, cuz eventually we'd all be crazy and need the answer.

Sic, you make me happy. When I was hanging out with my boyfriend after school that day we spent a good two hours trying to figure it out before we gave up for the day. Do you like these kinda things? I have more if you want.

oh yes, BRING IT!!!!!!!!!!!

i do luv 'em....i was purdy good at 'em....but man, that one was hard.....but yes, give me anutter....

Your a wandering stranger guy, and you come onto a path that splits into two paths. One leads to a village where everone lies, and the other to a village where everyone tells the truth. At the split of the path a villager awaits, you dont know which town he's from. You can ask one yes or no question to find out which village is which.

eeeeek!!!!!!!!!!

i'm drunk...but gimme a minute.....

see....i wanna be all "inductive" (i think) about it....asking: "If, and only if, you come from the left path, you must be a liar...."

if he says yes, i know he's lying....because as a liar he would be alloted to say "yes" as his logic would be sound (since he is a liar) but not valid (since he is a liar)...

so i would pick the right path......but i know this isn't the answer.....hmmmm

nonetheless, it seems like it must be some kind of IF, AND ONLY IF, kinda question.....GAH! i hate analytical philosophy.....

Then why did you ask for more? Lol. Your on the right track.

because itz fun.....but i hate it just the same.....

Heheh. I feel like that a lot.

Wow thats another old one LOL !! and its cute too !
I'll let you guys kick these classics around then give ya some more ! LOL ????

Aw hell here ya go ..

If you walk into a town with only two barbers which one do you choose to cut your hair the barber who is bald or the barber with the great looking hair ??( and the towns ppl wont help you !!

These are considered more of a mystery rather than just riddle ..but the logic is sound .

i would choose the bald one... the other must have cut his hair..

agree.