QuoteOriginally posted by: joetIs the line infinite in both directions? ie when a prisoner looks at the hats in front of him, can he see a finite or infinte number?The line has a definite start position, so there is a prisoner (say number 0) who can see all the hats other than his own.

<t>My favourite hat problem:There are a countably infinite number of prisoners, arranged in a line. Each prisoner is given a black or white hat. They can see all the hats in front of them, but not their own hat or hats behins them. They simultaneously announce there hat colours. Before the guess, th...