In literature, the adverb "probably" is often employed to signal uncertainty, soften assertions, or introduce conjecture without committing to a definitive statement. For instance, authors use it to suggest that an outcome or fact is likely but not guaranteed, as seen when George Eliot notes that "rest would probably cure him" ([1]), or when Tolstoy’s character hints at moral ambiguity with “To do good, probably” ([2]). In historical and scholarly writings, "probably" functions to qualify information that is tentative or based on incomplete evidence, such as when Pliny refers to an obscure writer ([3]) or when structural attributions are made in texts by Adam Smith ([4], [5]). Moreover, in narrative fiction, "probably" helps build a realistic voice, allowing characters and narrators to present their observations as plausible interpretations—whether it’s suggesting that a boat has "probably" left already ([6]) or speculating about a character's actions in a moment of uncertainty ([7]). Overall, its pervasive presence across genres underscores its utility in balancing assertiveness with the reality of interpretative gaps in both fact and fiction.