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#899769 - 07/08/13 10:57 AM Coffee?
CanukDenis Online   content
Adept Boomer

Registered: 11/26/00
Posts: 14923
Loc: Ottawa Ontario Canada
Four logicians in a restaurant have just finished lunch
when the waitress comes by and asks "Do all of you want coffee?"

The first logician answers "I don't know".

The 2nd and 3rd logicians also answer "I don't know".

The 4th logician answers "No"

Assuming all 4 responded with correct answers ,
how many want coffee and which ones , if any , want coffee.
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I'm a man of few words...but I use them often

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#899789 - 07/08/13 12:29 PM Re: Coffee? [Re: CanukDenis]
nell_nerhegeb Offline
Shy Boomer

Registered: 01/11/13
Posts: 20
.. I have a feeling I missed something laugh

The 4th doesn't want coffee.

The first three want coffee.

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#899793 - 07/08/13 01:02 PM Re: Coffee? [Re: CanukDenis]
BobH Offline
Addicted Boomer

Registered: 10/14/11
Posts: 1388
Loc: 47.79N, 122.24W
Nell, by my logic, you got it right. They take the waitress literally when she asks if they ALL want coffee. If the first one didn't want coffee, he would know that they then couldn't ALL want coffee so he would say no. It is only if he wanted coffee that he would have to answer, "I don't know" because he wouldn't yet know if every one of them wanted coffee.

The same goes for the second and third logicians until finally the fourth can say with certainty that they don't ALL want coffee because he doesn't.
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Bob
I've learned that if you're too busy to help a friend, you're too busy.

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#899794 - 07/08/13 01:12 PM Re: Coffee? [Re: CanukDenis]
CanukDenis Online   content
Adept Boomer

Registered: 11/26/00
Posts: 14923
Loc: Ottawa Ontario Canada
Ya'll got it!
The 4th logician could instead have said:
"bring 3 coffees"
_________________________
I'm a man of few words...but I use them often

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#899795 - 07/08/13 01:23 PM Re: Coffee? [Re: CanukDenis]
Redz Offline
Adept Boomer

Registered: 08/12/00
Posts: 11733
Loc: Doylestown, Pennsylvania
birthday, BobH. Hope you have a great day grin

Joan wave

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#899799 - 07/08/13 01:35 PM Re: Coffee? [Re: Redz]
Sherlock Offline
BAAG Specialist

Registered: 02/27/01
Posts: 7140
Loc: Minnesota, USA
Happy Birthday, Bob! birthday
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I stopped fighting my inner demons. We're on the same side now.

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#899802 - 07/08/13 01:43 PM Re: Coffee? [Re: CanukDenis]
BobH Offline
Addicted Boomer

Registered: 10/14/11
Posts: 1388
Loc: 47.79N, 122.24W
Thanks for the birthday wishes! penguin
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Bob
I've learned that if you're too busy to help a friend, you're too busy.

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#899803 - 07/08/13 01:57 PM Re: Coffee? [Re: CanukDenis]
nell_nerhegeb Offline
Shy Boomer

Registered: 01/11/13
Posts: 20
Oh good, that was also my line of thought.

A Happy Birthday from me as well smile

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#899894 - 07/08/13 08:59 PM Re: Coffee? [Re: CanukDenis]
soot Offline
Puzzled Moderator
True Blue Boomer

Registered: 04/16/05
Posts: 20620
Loc: Usually up an Alabama Tree
Welcome to the Garden Nell wave
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#900240 - 07/10/13 11:26 AM Re: Coffee? [Re: CanukDenis]
nell_nerhegeb Offline
Shy Boomer

Registered: 01/11/13
Posts: 20
Thank you soot smile I'm sure I'll come here again

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