To admit no things in themselves at all, or to pass off our experience as the only possible mode of cognition of things, is to take principles of the possibility of experience for universal conditions of things in themselves.
Prolegomena §57, second paragraph. The two disjuncts, "gar keine Dinge an sich selbst einräumen" and "unsere Erfahrung für die einzig mögliche Erkenntnißart der Dinge ... ausgeben" (4:350.35–351.01), the second expanded by "mithin" (our intuition as the only possible intuition, our discursive understanding as the archetype of every understanding, 4:351.01–04), are joined by a second "mithin" to "Principien der Möglichkeit der Erfahrung für allgemeine Bedingungen der Dinge an sich selbst ... gehalten wissen" (AA 4:350.35–351.05). The map reads the "mithin" as Kant's statement that the first entails the last; the verdict "Ungereimtheit" in the same sentence is the conclusion of the argument this claim is a premise of.