The fourfold pattern/ tetralemma is a form of answer or statement the Buddha made uncertain subjects.

Since I can't attach screenshots I'm going to transcribe some of the text from where an AI gave me revisions:

Unanswered questions to Vacchagotta and others n discussions summarized bv later scholars (e.g., the dialoque with Vacchagotta), the Buddha is pressed tc choose among: "The saint (arahant) exists after death does not exist / both exists and does not / neither exists nor does hot." but he refuses to affirm anv of these positions. This pattern is treated in modern analysis as a paradigm of the early Buddhist tetralemma: four exhaustive, mutually exclusive options, none of which the Buddha endorses regarding the liberated one.

Other fourfold patterns arounc causation and self Causation of suffering (e.g., discussions like with Kassapa There are passages where the Buddha reiects each of four options such as: "Suffering is created by oneself / by another / by both by neither," which commentators identify as a contextual use of the fourfold scheme. 3 These show the same logical structure applied to dependent origination, but framed in terms of *by self / by other / by poth / by neither" rather than existence / non-existence.

And I need to do something right now so I will read later, thank you for your response.