Mudcat Café message #3502249 The Mudcat Café TM
Thread #150321   Message #3502249
Posted By: Mr Red
12-Apr-13 - 10:47 AM
Thread Name: BS: Stupid riddle but can you explain it?
Subject: RE: BS: Stupid riddle but can you explain it?
I called it a riddle because it can be asked as a riddle in the same way that the "two brothers" is put as a riddle - as opposed to a lesson in logic. viz

two brothers at a T junction. One always tells the truth, one always lies. How do you find which way to go?

This is - in a very similar vein, two bit binary logic. You ask: one brother what the other brother would say if you asked the way to go.

It reduces the four binary combinations to one. A lie. And go the other way. In boolean logic this is an "exclusive OR" gate (OK with an invert on one input and probably on the output too). - Who yawned?

Anyway thanks for discussing it and I am sorry if it stirred any discomfort herein.