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Posted 2/13/17 , edited 2/13/17
I seem to like two paradoxes, even though they fairly simple.

1. Barber Shop paradox- Suppose there exists a man in a village (the barber) who must shave those and only those men in that village who do not shave themselves. (No, the barber can't be a woman or from out of town OR a robot!) Does the barber shave himself?

2. (more of a short story, but still a paradox)"All you Zombies" by Robert Heinlein- A baby girl is mysteriously dropped off at an orphanage in Cleveland in 1945. "Jane" grows up lonely and dejected, not knowing who her parents are, until one day in 1963 she is strangely attracted to a drifter. She falls in love with him. But just when things are finally looking up for Jane, a series of disasters strike. First, she becomes pregnant by the drifter, who then disappears. Second, during the complicated delivery, doctors find that Jane has both sets of sex organs, and to save her life, they are forced to surgically convert "her" to a "him." Finally, a mysterious stranger kidnaps her baby from the delivery room.

Reeling from these disasters, rejected by society, scorned by fate, "he" becomes a drunkard and drifter. Not only has Jane lost her parents and her lover, but he has lost his only child as well. Years later, in 1970, he stumbles into a lonely bar, called Pop's Place, and spills out his pathetic story to an elderly bartender. The sympathetic bartender offers the drifter the chance to avenge the stranger who left her pregnant and abandoned, on the condition that he join the "time travelers corps." Both of them enter a time machine, and the bartender drops off the drifter in 1963. The drifter is strangely attracted to a young orphan woman, who subsequently becomes pregnant.

The bartender then goes forward 9 months, kidnaps the baby girl from the hospital, and drops off the baby in an orphanage back in 1945. Then the bartender drops off the thoroughly confused drifter in 1985, to enlist in the time travelers corps. The drifter eventually gets his life together, becomes a respected and elderly member of the time travelers corps, and then disguises himself as a bartender and has his most difficult mission: a date with destiny, meeting a certain drifter at Pop's Place in 1970.
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Posted 2/13/17
1. Yes.
2. Credit the author.
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Posted 2/13/17
forgot to thank you.
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Posted 2/13/17
Heinlein had the best time travel, I think.

As to paradoxies, they tend to fall apart to me, either from being based on an unsupportable premise, or from being inconsistent internally.

So I guess the best paradox I can think of, right now, is from Dwarf Fortress in that you can't make anvils without having an anvil to make anvils with.
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Posted 2/13/17
For number two it's impossible. There must have been a "first" for the journey. For the events to take place, they all revolve around the time travel. However, during the first (original) timeline, nothing would have happened yet, thus could have never done the things. So it's impossible.
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Posted 2/13/17

kata89 wrote:

For number two it's impossible. There must have been a "first" for the journey. For the events to take place, they all revolve around the time travel. However, during the first (original) timeline, nothing would have happened yet, thus could have never done the things. So it's impossible.


No, actually. The way it works is that there never was a 'first'. Jane always grew up to become Agent to who impregnated Jane and stole the baby back to the past to grow up as Jane. The timeline falls apart if any of that doesn't happen, and branches off.
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Posted 2/13/17
my next statement is true. my previous statement was false.
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Posted 2/13/17 , edited 2/13/17
The Fermi Paradox is really cool

Fun read: http://waitbutwhy.com/2014/05/fermi-paradox.html
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18 / M / Ypsilanti, Michigan
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Posted 2/13/17 , edited 2/13/17
She couldn't have gotten pregnant without "him," but "him" was only possible because of "him" which was only possible because of "him" There is no way to start the cycle. You already need the cycle to move. Thus this is impossible.
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Posted 2/13/17
Simpson's Paradox is fun.

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Posted 2/14/17

BirdOfFlocks wrote:

The Fermi Paradox is really cool

Fun read: http://waitbutwhy.com/2014/05/fermi-paradox.html


I spend a lot of time thinking on this one. Lots of reasons why but I sure would like to find out.
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Posted 2/14/17
The one where I don't waste my time on hypotheticals and get some pu-orange juice.
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Posted 2/14/17

MemeMaker wrote:

I seem to like two paradoxes, even though they fairly simple.

1. Barber Shop paradox- Suppose there exists a man in a village (the barber) who must shave those and only those men in that village who do not shave themselves. (No, the barber can't be a woman or from out of town OR a robot!) Does the barber shave himself?


Er, haven't heard that one--
Sounded like a badly-remembered version of that old puzzle about the town with two barbers: One shop had a neatly cut and shaved barber, but a messy shop, the other had a messy cut/shave, but a neat shop. A traveler arrived in town, needed a haircut, and immediately went to the barber with the messy cut/shave. Why?

Not a paradox per se, but still makes you feel like an idiot if you don't get it.

As for paradoxes, Gilbert & Sullivan already weighed in on those:
https://www.youtube.com/watch?v=XXhJKzI1u48
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Posted 2/14/17
The truth exists outside of our beliefs, if i am wrong the truth exists outside of this belief.
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