Wherein lies the secret to never knowing the answer, but always being certain that the answer will never be known?
Step 1: Randomly flip a coin.
Step 2: Interpret the result as 'yes' or 'no'.
Step 3: Immediately forget the result.
Step 4: Repeat steps 1-3 until sanity is lost.
But wait, what about entanglement? Maybe we can get a better answer that way...
Disclaimer: This plan has not been tested on humans. Prolonged use may cause confusion, frustration, or existential dread.