KANT AND BOLZANO ON THE SINGULARITY OF INTUITIONS

Kant and Bolzano agree that intuitions are non-accidentally singular, but each offers more than one explanation of why this is the case. One model, exemplified by Bolzano's explication of intuitions as "this"-representations, posits a type of representation which is such that it can only have one object. A very different explanation, prominent in Kant's Transcendental Aesthetic, has recourse to the fact that certain classes of objects (spaces and times) can have only one instance, and argues on this basis that some representations with those contents are singular. This paper surveys various versions of these two explanations and uses each philosopher's answers to shed light on the other's.