Ignostic refers to someone who believes that the concept of a deity is undefined, meaningless or cannot be verified. Synonyms of this word include agnostic, skeptic, non-theist, or philosophical naturalist. An agnostic also shares a similar view as the ignostic as they are unsure of the existence of a deity but do not completely deny the possibility of it. Non-theist is another synonym of ignostic which suggests that someone does not believe in any form of supernaturalism, including a deity. A skeptic is a synonym of ignostic because they approach the concept of a deity with a skeptical mindset and require evidence to validate any claims. Lastly, a philosophical naturalist shares the same belief system as the ignostic in which that natural phenomena can be explained using natural explanations.