Sigh...
SCOTUS only sets a precedent when it issues a ruling.
no
Prec·e·dent
noun
/ˈpresəd(ə)nt/
- an earlier event or action that is regarded as an example or guide to be considered in subsequent similar circumstances.
they declined cert, that is a precedent. All other cases were dismissed.
Case Law is what occurs when they issue a ruling.