- Conceptual reciprocity(as a logical relationship)
- A two-way logical relationship where two ideas depend on each other and can't be fully understood separately—if one is true, the other must be true too.
- Henry Allison(A modern Kant interpreter cited as evidence for the claim)
- A contemporary American philosophy scholar who specializes in interpreting Kant's work and has written influential books explaining what Kant really meant by his most difficult ideas.
- Paul Guyer(as a Kant scholar)
- Another major Kant scholar who has written extensively about how to understand Kant's philosophy, particularly his theory of knowledge and aesthetics.
- Sufficiency reading(as a method of textual interpretation)
- A particular way of interpreting a philosophical argument where something is shown to be 'enough' to guarantee a conclusion—in this case, that unity of consciousness is enough to guarantee knowledge of the real world.
- Textually unavoidable(as a claim about how to read philosophy)
- The idea that when you carefully read the actual words of a philosophical text, a particular interpretation is the only reasonable one; the text forces you to this conclusion.
- objective validity(Kant's epistemology; contrasted with merely subjective validity)
- The property of a representation whereby it represents an objective feature of reality — a feature whose existence and nature is independent of how it is perceived.
- unity of apperception(Kant)
- The necessary unity of self-consciousness achieved through the action of judging.
- §17(as a text notation)
- A reference to section 17 of a philosophical text (in this case, Kant's 'Critique of Pure Reason'); the symbol § means 'section.'