the urine-level between Clean and Royally Pinched
like any line, or a tennis court’s boundaries, or like maybe say a certain drug’s urine-level range between Clean and Royally Pinched.
Context
Pemulis smuggles the drug economy into a calculus lesson: the Mean-Value formula illustrated, among its examples, by "a certain drug's urine-level range between Clean and Royally Pinched" — the piss-test math the E.T.A. users actually live by, dropped in as though it were as neutral as a court's baseline. The clean-urine anxiety rendered as a bounded interval to integrate over.