Author Topic: A Cognitive Reflection Test  (Read 3979 times)

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Offline Colwyn

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Re: A Cognitive Reflection Test
« Reply #10 on: October 12, 2017, 15:15:38 PM »
KKOB, if you hadn't told H which one he got wrong, would he and Mary have been able to compare notes and be certain of the correct three answers?    a. Yes   b. No.
« Last Edit: October 12, 2017, 15:24:14 PM by Colwyn »



Offline KKOB

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Re: A Cognitive Reflection Test
« Reply #11 on: October 12, 2017, 16:46:58 PM »
c. Don't know.

Offline mary62

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Re: A Cognitive Reflection Test
« Reply #12 on: October 12, 2017, 20:17:57 PM »
Whoo Hoo I got all 3 right....But I did take my time though.

Offline Bluwise

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Re: A Cognitive Reflection Test
« Reply #13 on: October 13, 2017, 07:36:58 AM »
Looks like it's my round then  : :)

Offline KKOB

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Re: A Cognitive Reflection Test
« Reply #14 on: October 13, 2017, 08:45:45 AM »
The answers are
a.5p
b.5 minutes
c. 47 days ( Although there is an argument that 1 is the correct answer as on day 47 the lake surface is half covered and on day 48 it's completely covered. )

Offline Colwyn

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Re: A Cognitive Reflection Test
« Reply #15 on: October 13, 2017, 10:12:32 AM »
I reckon the answer to my follow up question is "a. Yes" but only if H and Mary agree to put in different lists of answers so one of them is bound to be right.

Working: We know that H has one wrong, Mary has one wrong, and they are not the same. So that means that they have right answer in common. I'll call that answer "A" and the other answers give different letters. So:
Question.           1        2        3
Answer H           A        B        C
Answer Mary      A        D        E
We know that H has got one wrong. He guesses it is Q2 and so resubmits his answers as A-D-C. Mary must guess the other way and suppose H's answer to Q3 is wrong so she must answer A-B-E. Both possible combinations are thus covered. One must be right.

I think.

Offline mary62

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Re: A Cognitive Reflection Test
« Reply #16 on: October 13, 2017, 10:47:10 AM »
I reckon the answer to my follow up question is "a. Yes" but only if H and Mary agree to put in different lists of answers so one of them is bound to be right.

Working: We know that H has one wrong, Mary has one wrong, and they are not the same. So that means that they have right answer in common. I'll call that answer "A" and the other answers give different letters. So:
Question.           1        2        3
Answer H           A        B        C
Answer Mary      A        D        E
We know that H has got one wrong. He guesses it is Q2 and so resubmits his answers as A-D-C. Mary must guess the other way and suppose H's answer to Q3 is wrong so she must answer A-B-E. Both possible combinations are thus covered. One must be right.

I think.
You are trying to blind me with science (or something)
I solved them all by meself.

Offline KKOB

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Re: A Cognitive Reflection Test
« Reply #17 on: October 13, 2017, 11:04:34 AM »

Offline Colwyn

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Re: A Cognitive Reflection Test
« Reply #18 on: October 13, 2017, 11:30:35 AM »
Back to your lily pad, Froggy.




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