Truth tellers or liars among two people

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Two guys, number One and number Two. You ask number One "Is there a truth-teller among you?". He replies and you have the answer to your question. What is number One and what is number Two?

logical-deduction liars

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edited 1 hour ago

Kevin L

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ponikoli

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up vote
3
down vote

favorite

Two guys, number One and number Two. You ask number One "Is there a truth-teller among you?". He replies and you have the answer to your question. What is number One and what is number Two?

logical-deduction liars

share|improve this question

edited 1 hour ago

Kevin L

2,043434

asked 4 hours ago

ponikoli

161

New contributor

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

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up vote
3
down vote

favorite

up vote
3
down vote

favorite

Two guys, number One and number Two. You ask number One "Is there a truth-teller among you?". He replies and you have the answer to your question. What is number One and what is number Two?

logical-deduction liars

share|improve this question

edited 1 hour ago

Kevin L

2,043434

asked 4 hours ago

ponikoli

161

New contributor

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

Two guys, number One and number Two. You ask number One "Is there a truth-teller among you?". He replies and you have the answer to your question. What is number One and what is number Two?

logical-deduction liars

logical-deduction liars

share|improve this question

edited 1 hour ago

Kevin L

2,043434

asked 4 hours ago

ponikoli

161

New contributor

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 1 hour ago

Kevin L

2,043434

asked 4 hours ago

ponikoli

161

New contributor

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

share|improve this question

edited 1 hour ago

Kevin L

2,043434

edited 1 hour ago

Kevin L

2,043434

edited 1 hour ago

Kevin L

2,043434

2,043434

asked 4 hours ago

ponikoli

161

New contributor

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 4 hours ago

ponikoli

161

asked 4 hours ago

ponikoli

161

161

New contributor

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

New contributor

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

ponikoli is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

add a comment | 

1 Answer
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up vote
3
down vote

Answer:

#1 is a liar and #2 is a truth teller

Reason:

Assume that #1 and #2 are truth tellers, the answer to your question is Yes

Assume that #1 is a truth teller and #2 isn't, the answer to your question is Yes

Assume that #1 is a liar and #2 is a truth teller, the answer to your question is No

Assume that #1 and #2 are liars, the answer to your question is Yes

Since you are able to deduce who is who from this single question, the only combination where there is no uncertainty is if you get a No response.

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answered 4 hours ago

Cameron Aavik

3766

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
3
down vote

Answer:

#1 is a liar and #2 is a truth teller

Reason:

Assume that #1 and #2 are truth tellers, the answer to your question is Yes

Assume that #1 is a truth teller and #2 isn't, the answer to your question is Yes

Assume that #1 is a liar and #2 is a truth teller, the answer to your question is No

Assume that #1 and #2 are liars, the answer to your question is Yes

Since you are able to deduce who is who from this single question, the only combination where there is no uncertainty is if you get a No response.

share|improve this answer

answered 4 hours ago

Cameron Aavik

3766

add a comment | 

up vote
3
down vote

Answer:

#1 is a liar and #2 is a truth teller

Reason:

Assume that #1 and #2 are truth tellers, the answer to your question is Yes

Assume that #1 is a truth teller and #2 isn't, the answer to your question is Yes

Assume that #1 is a liar and #2 is a truth teller, the answer to your question is No

Assume that #1 and #2 are liars, the answer to your question is Yes

Since you are able to deduce who is who from this single question, the only combination where there is no uncertainty is if you get a No response.

share|improve this answer

answered 4 hours ago

Cameron Aavik

3766

add a comment | 

up vote
3
down vote

up vote
3
down vote

Answer:

#1 is a liar and #2 is a truth teller

Reason:

Assume that #1 and #2 are truth tellers, the answer to your question is Yes

Assume that #1 is a truth teller and #2 isn't, the answer to your question is Yes

Assume that #1 is a liar and #2 is a truth teller, the answer to your question is No

Assume that #1 and #2 are liars, the answer to your question is Yes

Since you are able to deduce who is who from this single question, the only combination where there is no uncertainty is if you get a No response.

share|improve this answer

answered 4 hours ago

Cameron Aavik

3766

Answer:

#1 is a liar and #2 is a truth teller

Reason:

Assume that #1 and #2 are truth tellers, the answer to your question is Yes

Assume that #1 is a truth teller and #2 isn't, the answer to your question is Yes

Assume that #1 is a liar and #2 is a truth teller, the answer to your question is No

Assume that #1 and #2 are liars, the answer to your question is Yes

Since you are able to deduce who is who from this single question, the only combination where there is no uncertainty is if you get a No response.

share|improve this answer

answered 4 hours ago

Cameron Aavik

3766

share|improve this answer

share|improve this answer

answered 4 hours ago

Cameron Aavik

3766

answered 4 hours ago

Cameron Aavik

3766

answered 4 hours ago

Cameron Aavik

3766

3766

add a comment | 

add a comment | 

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