How Logical Are You? (Psychology of Reasoning)

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Published 2015-03-05
So just how logical are you? This 4-card selection task developed by Peter Wason in 1963 will help you find out! All you need to do is assess which of the 4 cards must be turned over in order to determine whether the rule has been followed.

Music: "Brittle Rille" by Kevin MacLeod (incompetech.com)
incompetech.com/music/royalty-free/
Music licensed under Creative Commons (creativecommons.org/licenses/by/3.0/)

Sunrise footage by Beachfront B-Roll (www.beachfrontbroll.com/)
(youtube.com/user/Beachfrontprod)

All Comments (21)
  • @rapsody230
    Everything in the video is worded wrong, the rule should be: "If the card has a vowel on the side showed to you, it must have an even number on the other side" Worded as it is in the video EVERY card should logically turned over to confirm that the poorly worded rule is not broken. I don't care how "logic" one is if they can't even understand the importance of the clarity when explaining the rules of a game.
  • You never distinguished that "one side" is ONLY the side shown and "other side" is ONLY the one hidden. That is why people slip up. And it's cheap because it's a simply lack of information.
  • @AubryRugBurn
    I said to turn over all of them. But I have trust issues.
  • @Sargentleman
    "How do we know that all tigers have stripes?" At this point, there's so few, we could just check them all.
  • Anybody else come here because it was recommended to you, even though it was posted a year ago?
  • @johnnys7875
    This video is all about expaining logic, yet it's confusing as fuck
  • This was so good! I got caught by the A2 trap and now all I wanna do is learn how to think logically
  • @makemyday1477
    I'm in the 4% but I used the wag system, wild assed guess.
  • @WonderWhy
    I definitely said "tiger" way too many times in this video... It took me ages to finally decide on "All tigers have stripes" as my example. I have seen a few news articles of a "tiger with no stripes" and if you type that into Google Images you will get some results... but if you actually look at the pictures, none of them are genuinely stripe-less. They either have stripes on their face or tail.  But anyway, even if it turned out there were a tiger (or even a species of tiger) with no stripes... that kind of just goes with what I was saying, that we cannot know anything with 100% certainty.  That being said... just because the possibility exists that something is wrong, is no reason to reject scientific research. Just because something is possible, doesn't mean it's ever going to happen. It's possible that Vladimir Putin himself could come to your door and say that he wants to watch How I Met Your Mother on Netflix with you. It's possible, it's just never going to happen.  All I'm saying is... just because the possibility of something happening exists, doesn't mean it ever will. Just because there is the possibility that any given scientific research is wrong, doesn't mean it's even remotely likely. 
  • Well maybe if people could understand the question, we'd be able to answer correctly.
  • @era858
    i thought AK27 was supposed to be AK47
  • I didn't understand why I got Wason wrong until I saw this. Now it makes sense. I still think the wording of Wason is confusing though as I thought you were looking for a fault in the card printing machine..
  • @typorad
    I was so confused about the cards until you showed they were double-sided.
  • @Elintasokas
    Funny how immediately obvious it became with the real world example, yet I utterly failed to comprehend the first version. I would've said all cards. I think an inherent problem with puzzles like this is, especially when worded as "How Logical Are You?", is that they put people on the spot. What goes through their heads is "if I don't get this right, I'm dumb." It creates pressure and makes people lock up, kind of like someone having to perform a piece for an audience or holding a presentation. Therefore, they might not be able to think clearly.
  • @XxXgabbO95XxX
    My logic is correct, this test must be false. therefore, if this test is false, then my logic is correct. 4.6k people must have been thought that.
  • @Micnificent1997
    I must have missed the part when the cards had shit on the opposite side. The information and instructions werent clear. Had nothing to do with "logic," but how you explained it.
  • @RobBates
    I hate this test. It is fundamentally flawed. The correct answer is A, K, & 7. A & 7 are explained in this video. K must be turned over because it could have a vowel on the other side. ...but wait, we established that all cards have numbers on one side and letters on the other, right? No, they asserted that all cards have numbers on one side and letters on the other. In order to confirm that, we must turn over the K. If it has a vowel on the other side, the rule has been falsified. This may seem like a trivial critique, but this failure in logic is at the heart of most invalid scientific experiments. People make assumptions about which variables matter, and suddenly their "control" group is invalid because they haven't accounted for a variable (usually several variables) because of their innate biased assumptions.
  • @jeezythecat
    Here's a very simple way of explaining this test. The point is to put aside the tiles which are IRRELEVANT to the rule. As in, it matters NOT what is on the other side, because either way it will not break the rule. K is put aside because K is a consonant, and there is no mention of consonants in the rule. 2 is put aside because the rule states "If the letter is a vowel, the other side must be an even number" yet it does NOT state that an even number must necessarily have a vowel on it's flip-side. A and 7 are the correct choices because what lies on the other side of those tiles can, in fact, determine whether the given rule is upheld or it is not.