Coerced by Persians or Demons?

The Talmud's Argument Against Idealism

If one was forcibly compelled to eat matza on Passover, he has fulfilled his obligation.

Who compelled him to eat the matza?

If we say that a demon forced him, i.e., that he ate it in a moment of insanity, this is difficult. Isn’t it taught in a baraita: With regard to someone who is at times sane and at times insane, at the times when he is sane, he is …