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Who is Sylvia?


Best Answer TimeSpaceLightForce, 22 April 2013 - 05:23 PM

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#1 bonanova

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Posted 22 April 2013 - 08:12 AM

Who is Silvia? what is she,

        That all our swains commend her?

Holy, fair, and wise is she;

        The heaven such grace did lend her,

That she might admirèd be.

 

Is she kind as she is fair?

        For beauty lives with kindness.

Love doth to her eyes repair,

        To help him of his blindness,

And, being helped, inhabits there.

 

Then to Silvia let us sing,

        That Silvia is excelling;

She excels each mortal thing

        Upon the dull earth dwelling:

To her let us garlands bring.

 

                                    William Shakespeare

 

Let it never be said that the Den does not feed the soul as it exercises the mind. ;)

 

OK, now the puzzle, compliments of Raymond Smullyan, somewhat of a new hero for me:

 

There are twin sisters.

One lies and one tells the truth.

One is named Sylvia.

 

How can you discover which sister is Sylvia by asking one three-word question?

There may be more than one answer.


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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#2 bhramarraj

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Posted 22 April 2013 - 08:57 AM

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#3 TimeSpaceLightForce

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Posted 22 April 2013 - 03:18 PM

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#4 BMAD

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Posted 22 April 2013 - 03:37 PM

Spoiler for

Spoiler for not sure

 

Spoiler for my attempt

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#5 TimeSpaceLightForce

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Posted 22 April 2013 - 04:19 PM

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#6 BMAD

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Posted 22 April 2013 - 04:21 PM

we don't know if Sylvia tells the truth

 



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#7 TimeSpaceLightForce

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Posted 22 April 2013 - 05:23 PM   Best Answer

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#8 bonanova

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Posted 22 April 2013 - 06:38 PM

TSLF has a crisp question. Some of the others might work also.
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#9 BMAD

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Posted 22 April 2013 - 06:40 PM

Would Sylvia respond to this question?

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#10 bonanova

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Posted 22 April 2013 - 06:50 PM

Would Sylvia respond to this question?

Spoiler for

Sure. There is a person named Sylvia.
That person has a truth property: Sylvia(Truthful) or Sylvia(Liar).
Any person knowledgable on the subject, (that includes Sylvia) can respond to the question: Sylvia(Liar)?

I was uncertain about these:

"Aren't you Sylvia?" Do you say yes or no truthfully if you are?
"Are you twins?" And "are you Mia?" Don't seem to resolve it.
"Sylvia, want this?" Might decompose to "are you Sylvia AND if so do you want this?" Which the sister could respond to.
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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell




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