## Search found 387 matches

Tue Mar 27, 2012 12:14 pm UTC
Forum: Serious Business
Topic: Is Atheism a Rational Stance?
Replies: 570
Views: 54850

### Re: Is Atheism a Rational Stance?

There is however no good evidence that there is no god. God, being an intangible concept, tends to get redefined to fit the evidence. This is why new religions break off from mainstream ones, either they define him some new way, or the mainstream branch changes their definition (maybe "underst...
Fri Jan 27, 2012 1:32 pm UTC
Forum: Logic Puzzles
Topic: A hundred tourists
Replies: 28
Views: 11841

### Re: A hundred tourists

No, by his rules, all 100 tourists will guess red. It's not that they guess whichever they see the most of, it's if they see some number (or greater) of red, then guess red. Otherwise, perform the same test with blue. If they still have not guessed, then they are guaranteed to guess white. My mista...
Thu Jan 26, 2012 4:10 pm UTC
Forum: Logic Puzzles
Topic: A hundred tourists
Replies: 28
Views: 11841

### Re: A hundred tourists

Sorry, I haven't digressed, I'm working on the assumption that none of the prisoners can hear what the others are saying. Also, my solution need a little twerking, but I have now found the solution that saves at least 33 prisoners in the worst case. If a prisoner sees at least 32 red hats, then gue...
Wed Jan 25, 2012 2:57 pm UTC
Forum: Logic Puzzles
Topic: Cipher Problem
Replies: 7
Views: 4479

### Re: Cipher Problem

The problem with that website is that it won't always have the right answer, I tried a few coded sentences and it did not come up with the right answer. It quite likely doesn't have many proper names (such as places that may be present in minecraft). It also may assume that there's no punctuation s...
Wed Jan 25, 2012 2:47 pm UTC
Forum: Logic Puzzles
Topic: A hundred tourists
Replies: 28
Views: 11841

### Re: A hundred tourists

Yes, that's the one! I am working on a better solution to the problem than above, but I can't figure out how to get past the worst-case scenario. Maybe if I try for a non-symmetric solution then that will work. :D Edit: Eureka! If the person sees more than 32 red hats, guess red, if not, then if th...
Wed Jan 11, 2012 9:10 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1002: "Game AIs"
Replies: 251
Views: 106871

### Re: 1002: "Game AIs"

Computer AI in Starcraft is nothing more than a training dummy. It is made to test builds. Playing against AI in video games like Starcraft is like playing a game of chess with a chessboard. Who cares how smart the chessboard is? I mean, IT’S A FREAKING CHESSBOARD As has been pointed out, the comic...
Wed Dec 28, 2011 1:52 pm UTC
Forum: Logic Puzzles
Topic: Some tricky logic puzzles.
Replies: 41
Views: 10768

### Re: Some tricky logic puzzles.

Some aliens come and abduct 10 people. For this question, there is a deterministic method which saves at least 9 people. As has been pointed out, your restriction of being able to see only the person in front of you and not the entire set of people in front of you removes the parity solution which ...
Wed Dec 07, 2011 8:15 pm UTC
Forum: Logic Puzzles
Topic: Towers, Courtyard, and trees
Replies: 36
Views: 13754

### Re: Towers, Courtyard, and trees

This is really just blue-eyes in disguise, I think. Yes, very similar to Blue Eyes... I considered putting that in a spoiler'd hint tag, but that seemed like way too much of a hint. Very eloquent explanation of the solution. Douglasm summed it up, but perhaps it might help you imagine what would ha...
Wed Dec 07, 2011 3:06 pm UTC
Forum: Logic Puzzles
Topic: Towers, Courtyard, and trees
Replies: 36
Views: 13754

### Towers, Courtyard, and trees

Search didn't turn this riddle up, but it may be here in a different form (mice and cheese instead of towers and trees, for instance) so I apologize if it's a duplicate. Two perfect logicians, Al and Bob, are traveling in a foreign land when they are arrested for crimes against humanity. They are, o...
Mon Sep 12, 2011 12:13 pm UTC
Forum: Logic Puzzles
Topic: Twins in a Maze
Replies: 81
Views: 21505

### Re: Twins in a Maze

Take two random number generators and give them the same seed. Call next() on them and you should get the same sequence of output. That's the reason they're not called "random" generators. They are pseudo random generators . That was meant to be part of my point, true randomness doesn't a...
Wed Jul 27, 2011 11:46 am UTC
Forum: Logic Puzzles
Topic: Looking for hard and rare logic puzzles
Replies: 60
Views: 20502

### Re: Looking for hard and rare logic puzzles

Here's a site I've been frequenting for some years. At the very least, your first 3 examples are there in some form or another though I don't recognize the 500 students riddle. http://www.ocf.berkeley.edu/~wwu/riddles/intro.shtml I would recommend going through the posted riddles (which haven't been...
Wed May 18, 2011 11:45 am UTC
Forum: Logic Puzzles
Topic: Twins in a Maze
Replies: 81
Views: 21505

### Re: Twins in a Maze

If time is truly a non-issue, and randomness is possible: Have both twins travel in a semi-random fashion. For example, spinning in a circle for a varying amount of time and proceeding in a straight line, then repeating the procedure when an obstacle is reached. The two will meet *eventually*. But ...
Fri May 13, 2011 12:26 pm UTC
Forum: Logic Puzzles
Topic: Twins in a Maze
Replies: 81
Views: 21505

### Re: Twins in a Maze

The simplest maze (in my mind) seems to be the surface of a sphere (or perhaps the edge of a circle as mentioned before, contriving the absence of absolutes such as 'north' as being 'indeterminable'). The twins are placed on opposite points with the same orientation (to keep it symmetrical, say they...
Mon Sep 27, 2010 6:21 pm UTC
Forum: Logic Puzzles
Topic: Straw power
Replies: 42
Views: 8715

### Re: Straw power

Actually if we're allowed to blow on things to move them we might as well just take off my shoe and throw it at the bottle. Unless we're somehow supposed to assume we are allowed to impart force indirectly via a gas but not a solid. The puzzle is stupid and I refuse to spoiler my "answer"...
Wed Jun 02, 2010 12:49 pm UTC
Forum: Logic Puzzles
Topic: How to confirm if someone is your "future you"?
Replies: 96
Views: 14867

### Re: How to confirm if someone is your "future you"?

What we need is a question or request that only your future self can answer, but that you yourself cannot answer, but can verify. Unfortunately, I can't think of such a question. Based on rule #2, I'll assume that we aren't in a single continuum, but that going back in time essentially splits the u...
Tue Jun 01, 2010 8:42 pm UTC
Forum: Logic Puzzles
Topic: Truth or Lie?
Replies: 8
Views: 2465

### Re: Truth or Lie?

It seems there are many different ways to interpret From "I ask them from which clan the come from" I would assume that he asks them, in order, "What clan are you from?" and that is the only question asked. Since, regardless of truth vs. lie of each individual, they will always a...
Wed May 05, 2010 3:52 pm UTC
Forum: Logic Puzzles
Topic: Open deck, double-draw poker game
Replies: 3
Views: 1097

### Open deck, double-draw poker game

* Because in variations of possibilities describing this, it may have been posted elsewhere, quick searches on "poker" didn't seem to yield anything quite similar. Two players agree to play a poker game. The deck is completely revealed and the two will take turns drawing any cards they wan...
Thu Apr 15, 2010 8:18 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

Known words have 8 sequences, comparable words have 7 (since yes yes yes and no no no look the same), completely incomparable words have 4, so the first 2 situations are solvable (and solutions have been posted) and the last is not. Does the second scenario (unknown, comparable words) have a posted...
Thu Apr 15, 2010 2:47 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

Nitrodon's. If the words are incomparable, like the rumble of thunder and the the smell of flowers, then the first answer is just the first answer. It can't be related to the other possible answer in any way, and so there are only the four possible sequences of responses as described by nitrodon. T...
Wed Apr 14, 2010 8:06 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

That seems a good solution with the given premise. My initial 5/6 solution was very similar. 1) To God A: Is the word for "yes" alphabetically before the word for "no" 2) To God A: Is the word for "no" alphabetically before the word for "yes" a) In...
Wed Apr 14, 2010 5:54 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

Call the gods A,B,C. Ask god A: "If I asked you if B were random, would your answer be first among the words for yes/no?" Ask god B: "If I asked you if you were the truth teller, would your answer be first among the words for yes/no?" Now, If their answers are different, then yo...
Wed Apr 14, 2010 1:56 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

Interesting. What are the rules, do I have to know I'm right, or do I just ask 3 questions and make a guess and have to maximize the chances of winning? I would say maximize your chances of being certain given all possible configurations. Example scenario: 1) To God A: Is 1=1? 2) To God A: Is 1=1? ...
Tue Apr 13, 2010 7:57 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

This doesn't work. "If I asked you if B was random would you say "ja"?". If he answers "ja" that means either B is random or A is" - ja could mean no in his language. You don't know if it's yes or no he has replied. It doesn't matter if "ja" is yes or no...
Tue Apr 13, 2010 2:52 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

Once again, this has already been discussed in the thread. If you know the words ahead of time, it's possible, and there are numerous solutions posted. I don't think it's possible if you don't know the words ahead of time (and I think that's the consensus here), but as far as I can tell noone has p...
Mon Apr 12, 2010 1:00 pm UTC
Forum: Logic Puzzles
Topic: Is This Even Possible?
Replies: 77
Views: 27047

### Re: Is This Even Possible?

<solution> Excellent, now that there is yet another full solution given in this thread, it will only be a matter of time before someone else comes along claiming it's impossible. Except his full solution fails. His solution relies on knowing the words ahead of time, which is explicitly stated that ...
Mon Apr 05, 2010 5:20 pm UTC
Forum: Logic Puzzles
Topic: 2 Eggs and 100 Story Building
Replies: 3
Views: 4675

### Re: 2 Eggs and 100 Story Building

jaap wrote:It's been done before:
viewtopic.php?f=3&t=199

Thanks, search doesn't help when the terms you're searching for change :/
Mon Apr 05, 2010 3:51 pm UTC
Forum: Logic Puzzles
Topic: 2 Eggs and 100 Story Building
Replies: 3
Views: 4675

### 2 Eggs and 100 Story Building

You have two eggs and a 100 story building. These eggs are identical and possibly much harder than normal eggs. Your goal is to determine the highest floor of the building they can be dropped from without breaking using the fewest test drops. What is the optimal search algorithm? How many drops woul...

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