Eg: In a list of three items ("1", "2", "3") the user is asked which item is higher, 1 or 2. They select 1. They are then asked which is higher, 2 or 3. They select 3. The system then reasons: "1 is higher than 2. If 3 is lower than 2 it must logically be lower than 1 also." etc. (So that you can sort a list of items with the fewest theoretical comparisons possible.) Thanks!
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