Luck is a phenomenon or belief that humans may associate with experiencing improbable events, especially improbably positive or negative events. Philosophical naturalism, eschewing any supernatural explanations, might suggest that positive or negative events may happen at any time, and that even improbable events can happen by random chance. In this view, the epithet "lucky" or "unlucky" is a descriptive label that refers to an event's positivity, negativity, or improbability.