Unknown Number Logic
Arton and Billy are each given a positive integer, and they are told that the two positive integers are consecutive. The following conversation ensues:
Arton: "I don't know your number."
Billy: "I don't know your number either."
Arton: "Now I know your number!"
What is the largest possible value for Billy's number?
This is one part of 1+1 is not = to 3.