Abstract
This paper takes a fresh look at Kant’s transcendental idealism with a new reading of negative noumena as abstract entities. It shows that the three criteria for abstractness, i.e., non-spatiotemporality, causal inefficacy, and non-indiscernibility, are true of Kant’s negative noumena. Phenomena, by contrast, are concrete entities in space and time, which can be understood as spatiotemporally instantiated noumena. Kant’s distinction between noumena in the positive and negative sense will be reinterpreted as a distinction between non-spatiotemporally instantiated concrete entities and uninstantiated abstract entities. It argues that noumenal ignorance is confined to positive noumena, which can be identified with things in themselves.