Premise 3 states that a person P can only experience a state of affairs if it begins before P's death. This is argued to be true because experiencing a state requires the possibility of being causally affected by it. A state can causally affect a person only if the person exists after the state begins, and a person exists after a state begins only if the state started before the person's death, since death is a form of non-existence. Therefore, a state can only causally affect and be experienced by a person if it begins before the person's death.