Is there magic in Dr. Kalam's aphorisms I would say YES.... ANALYZE THIS. Dr APJ Abdul Kalam used to say "It is better to sit alone, than walk in the company of bad people" !!! Can we use Quantum circuits, gates and programming logic to solve this ? I would say Yes. Let us look at the statement in reverse : If we choose to walk, then there could be at least one bad person. Hence the value of the AND operation could be 0 or 1. Since we cannot walk alone, the result is 0 or 1 in classical computing. In quantum computing there are NO AND Gates. Only NOT gates can be used. Step 2 is inconclusive, and better avoided. From step 1, if you SIT, you can't STAND at the same Time. (axiomatic). If the NOT of the bit is 0, as part of a decision tree, SIT and stay put. I would call this "Quantum Alpha Beta Pruning" ! Bye Folks!!!