The word certainty in literature emerges as a versatile device to capture both the assurance of conviction and the uneasy tension between what is known and what remains elusive. Authors employ it to underscore a firm resolve or a sense of inevitable truth: some portray a palpable, almost empirical certainty—as when mathematical or logical precision is asserted to be nearly unchallengeable ([1], [2])—while others use it to evoke the inner emotional state or fate of individuals, lending their characters a momentary relief or, at times, a disquieting finality ([3], [4]). It can signify the steadfastness of personal belief or the soundness of critical observation, yet also serve to highlight the paradoxical nature of human understanding, where absolute assurance is often as disputable as it is desired ([5], [6], [7]).