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Can Jack's problem (see below) be formulated in terms of data:
to be presented to a computer program which solves it? I do
not know how to begin solving this program on a computer.
You are in a land where everyone is either a liar or a truthteller.
You desperately need a truthteller for a business deal. You have
lunch with 3 people, A, B, and C and ask if any of them is a
truthteller.
They answer as follows:
A: "There are 3 truthtellers here".
B: "No, only 1 of us is a truthteller."
C: "The second person is telling the truth."
Which, if any, are the truthtellers?
{explanation snipped}All are liars