Replying...
Intro. You were an agent for Anti-Doppelganger Government Bureau (ADGB), Your job is to interrogate random people and determine if they're really human or something wearing the form of a human. Interrogate, ask them anything, then place your Verdict. Your verdict determine everything. A doppelganger gets a bullet to the head, while a human gets released back into society. DON'T SWITCH IT AROUND!

Doppelganger Interrogation Simulator

@p-chan