|Thanks Pinocchio, just tear|
the space-time continuum
I think that's why I love that old song "Something's Gotta Give", where an irresistible force meets an immovable object. Which, of course, is completely impossible. If a force is irresistible, then it's not possible for an immovable object to even exist.
And there are so many of them, like the Crocodile Paradox, where if a crocodile steals a man's child and promises to return it if the man correctly predicts what the crocodile will do, what does the crocodile do if the man says that the crocodile won't return the child? Or the Socratic Paradox, which refers to a quote that Plato attributed to Socrates that went "I know one thing, that I know nothing". Or even the good old which came first, the chicken or the egg ... which we all know the answer to. Eggs have totally been around longer than chickens! Dinosaurs laid them for gods sake!
But I think the most mind blowing paradox I've ever heard of though was the one described in Robert Heinlein's short story "All You Zombies". It's basically a version of the Grandfather Paradox on steroids. We've all heard the old "If you travel back in time and kill your own grandfather, how can you have been born to travel back in time and kill your own grandfather" schtick, this just takes it several steps beyond that.
A baby girl is mysteriously left 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 bartender offers the drifter the chance to avenge the stranger who left her pregnant and abandoned, on the condition that he (Jane) 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 nine 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.
Essentially, the girl, the baby, the drifter and the bartender are all the same person. Is your mind blown? If not, try doing up a family tree for poor Jane. That'll definitely send you round the twist!