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An Odd Card Trick

chalkdustmagazine.com

41–46 of 46 posts

Re: An Odd Card Trick

#42

The wine and water explanation doesn’t make sense to me. Wine and water have different molar masses and combining a liter of water and a liter of wine doesn’t give exactly two liters of the new substance, in the same way as a liter of ping pong balls and a liter of sand doesn’t produce two liters of ping pong sand when mixed together - some of the molecules are bigger than some of the others. Once you pour a liter of…

Fine, replace the water and wine with two different liquids that have exactly the same molar mass.

You’re missing the point of the example by thinking of it as real. There’s no actual water or wine here.

Re: An Odd Card Trick

#44
It seems like the basic descriptions of these two tricks, the cards and the liquids, are terribly vague and imprecise in this article, so it's difficult to discuss it. In particular, it's unclear what information is shared, and what information is hidden.

The logical and mathematical analysis later in the article looks more detailed, but unfortunately the initial, fundamental, description of the process lacks clarity and forces us to guess the details

Re: An Odd Card Trick

#46

It seems like the basic descriptions of these two tricks, the cards and the liquids, are terribly vague and imprecise in this article, so it's difficult to discuss it. In particular, it's unclear what information is shared, and what information is hidden. The logical and mathematical analysis later in the article looks more detailed, but unfortunately the initial, fundamental, description of the process lacks clarity…

I have to admit I still don't understand what is going on with the water and wine part.

The card trick is pretty straightforward though. When you mix up the cards you end up with something like 7 face up and 3 face down in one deck and 3 down 7 up in the other. The trick is just that the magician flips his cards over, inverting the cards and matching the other deck. Presumably he does this while engaging in some misdirection.

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