The term "apodeictic" refers to something that is categorically certain or indisputable. Synonyms for this word include "certain", "undeniable", "inarguable", "unquestionable", and "indubitable". Other synonyms for apodeictic include "absolute", "conclusive", "decisive", "definitive", and "irrefutable". These words all convey a sense of something that is beyond doubt or argument. When describing a statement as apodeictic, it implies a level of authority or expertise that cannot be questioned. Regardless of the synonym used, the central meaning is the same - absolute truth that cannot be contested.