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Three smart biker dudes go into a dark closet, where there are five leather jackets that are identical except that three have a Harley-Davidson logo on the back while two have a Mini Cooper logo on the back. Each of the bikers selects a jacket and puts it on without being able to see which one it is. Each of them knows that (1) the closet has three Harley-Davidson jackets and two Mini Cooper jackets, and (2) the other two bikers have the same information. The bikers emerge from the closet wearing the jackets, and while each biker can see which jackets the other two are wearing, he cannot see what he is wearing. The first biker looks at the other two, thinks, and says, "Dude, I have no idea what I'm wearing." The second biker looks at the other two, thinks, and says, "Dude, me neither." The third biker, who is still wearing a headcast from his last accident and can't see a thing, nonetheless says, "Dude--I know what I'm wearing!" Which jacket is he wearing?
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Senior Java Developer

Interviewed at Acuitus

4.4★
Apr 6, 2010

Three smart biker dudes go into a dark closet, where there are five leather jackets that are identical except that three have a Harley-Davidson logo on the back while two have a Mini Cooper logo on the back. Each of the bikers selects a jacket and puts it on without being able to see which one it is. Each of them knows that (1) the closet has three Harley-Davidson jackets and two Mini Cooper jackets, and (2) the other two bikers have the same information. The bikers emerge from the closet wearing the jackets, and while each biker can see which jackets the other two are wearing, he cannot see what he is wearing. The first biker looks at the other two, thinks, and says, "Dude, I have no idea what I'm wearing." The second biker looks at the other two, thinks, and says, "Dude, me neither." The third biker, who is still wearing a headcast from his last accident and can't see a thing, nonetheless says, "Dude--I know what I'm wearing!" Which jacket is he wearing?

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