In literature, the term valid is employed to express a sense of soundness or legitimacy that ranges from subjective aesthetic judgments to objective, logically necessary conclusions. It can refer to a claim that is substantiated by reason—as when personal sensory impressions are described as valid yet inherently subjective ([1]) or when a moral or scientific argument is held to be apodeictically valid ([2], [3])—as well as to practical matters like the enforceability of legal contracts or the proper timing of notifications, where procedural standards must be met for a measure to be valid ([4], [5]). Furthermore, valid may denote that objections are refuted by cogent reasoning ([6], [7]) or that an artistic insight retains its relevance only within a specific domain ([8]). This versatility shows how “valid” operates as a critical evaluative term across diverse genres and contexts in literary discourse ([9], [10], [11]).