The book Philosophical Psychopathology reports on the case of a man who got into a real-life Catch-22 situation. He was brought to psychiatrists because he was suffering from mental delusions. He was afraid that he was going to be “locked up”. And the psychiatrists said that this was a delusion without any basis in reality. In fact, his delusion was so strong, that to avoid being locked up, he tried to kill himself. Based on this, the psychiatrists decided that he should be …… you guessed it …… locked up.
If they lock him up, then his belief was true, and he wasn’t really deluded, was he? So they shouldn’t be able to lock up him. But then his belief would turn out to be false. And they can lock him up after all. Somewhere, Alfred Tarski is getting uncomfortable in his grave.
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