Philosophy
The Metaphysics of Free Will and the Principle of Alternative Possibilities
Quick fact
In Harry Frankfurt's famous thought experiments, an agent can be morally responsible for an action even when they could not have done otherwise—because the interfering mechanism never actually intervenes.
Why this is interesting
You are about to press a button, but a psychologist has secretly been scanning your brain. Would you be morally blamed for pressing it, even if you genuinely had no other option?