I don't understand the first question. If I need to prove that the condition is true, In my mind, I would need turn over the first and the third cards ("D" and "3") so that I could prove that the "D" has a "3" on the other side of it and then to prove that the "3" has a "D" on the other side of it. Why, then, is the answer "D" and "7"? What does "7" have to do with proving the condition?
That doesn't answer my question. How is the "7" card any more likely to cheat than the "3" card? To me the "3" card is actually a more likely cheater because we're being told half the story is true with that card. A cheater would do much better by telling half the truth so if I see a "7" I'm already convinced that's not going to have a "D" on the other side and even if it did I already know it fails the test and there's no reason to waste time flipping it. Flipping the "3" card solves that.
Sorry,the error that you have made is assuming that this rule"If a card has a D on one side,it has a 3 on the other side"Implies this rule"If a card has 3 on one side,it has D on the other side".(cont)
We don't need to turn over the F because the cards have a letter on one side and a number on the other.That leaves us with 7.If 7 turns out to have a D on the other side it means the rule has an exception.
Actually, with the way you've presented it, the answers would be D, F, and 7, since you didn't specify (as Wason did) that cards have a letter on one side and a number on the other. Without that constraint, you would need to turn over the F to make sure there wasn't a D on the other side.
I still don't understand why I got the first question wrong. This is really not sitting well with my intellectual ego.
AngelSnacks 9 months ago
Typically brilliant my dear stone ;-)
MannyFandango 2 years ago
READ THIS COMMENT BEFORE TAKING THE FIRST TEST!!!!.The cards have a letter on one side and a number on the other.
worldlystone 3 years ago
u suck ass, moron
semiliteratedgod 3 years ago
.....why would you say that?
worldlystone 3 years ago
READ THIS COMMENT BEFORE TAKING THE FIRST TEST!!!!.The cards have a letter on one side and a number on the other.
worldlystone 4 years ago
Nice one
rozeboosje 4 years ago
Thanks:)
worldlystone 4 years ago
Shoot, I wrote 6 paragraphs, nothing posted!!!5/5
ReturnOfLion 4 years ago
READ THIS COMMENT BEFORE TAKING THE FIRST TEST!!!!.The cards have a letter on one side and a number on the other.
worldlystone 4 years ago
Very interesting vid. Thank you. :)
Rhonda9 4 years ago
I don't understand the first question. If I need to prove that the condition is true, In my mind, I would need turn over the first and the third cards ("D" and "3") so that I could prove that the "D" has a "3" on the other side of it and then to prove that the "3" has a "D" on the other side of it. Why, then, is the answer "D" and "7"? What does "7" have to do with proving the condition?
thalperi 4 years ago
You're looking to see if the rule has any "exceptions".You're looking for the cheater just like in the second question.
worldlystone 4 years ago
That doesn't answer my question. How is the "7" card any more likely to cheat than the "3" card? To me the "3" card is actually a more likely cheater because we're being told half the story is true with that card. A cheater would do much better by telling half the truth so if I see a "7" I'm already convinced that's not going to have a "D" on the other side and even if it did I already know it fails the test and there's no reason to waste time flipping it. Flipping the "3" card solves that.
thalperi 4 years ago
Sorry,the error that you have made is assuming that this rule"If a card has a D on one side,it has a 3 on the other side"Implies this rule"If a card has 3 on one side,it has D on the other side".(cont)
worldlystone 4 years ago
It can be any letter.3 does not need to be turned over for the same reason that 25 years old does not need to be turned in the second question.
worldlystone 4 years ago
The 3 does not need to have a D on the other side to stay in conformity with the first rule.
worldlystone 4 years ago
We don't need to turn over the F because the cards have a letter on one side and a number on the other.That leaves us with 7.If 7 turns out to have a D on the other side it means the rule has an exception.
worldlystone 4 years ago
READ THIS COMMENT BEFORE TAKING THE FIRST TEST!!!!.The cards have a letter on one side and a number on the other.
worldlystone 4 years ago
excellent!
msginca 4 years ago
Actually, with the way you've presented it, the answers would be D, F, and 7, since you didn't specify (as Wason did) that cards have a letter on one side and a number on the other. Without that constraint, you would need to turn over the F to make sure there wasn't a D on the other side.
shanedk 4 years ago
Damn!You're right!
worldlystone 4 years ago
Do you really have a cat head Mr worldlystone?
mike098755 4 years ago
Yes.
worldlystone 4 years ago