Since 1976 Hilary Putnam has drawn parallels between his ‘internal’, ‘pragmatic’, ‘natural’ or ‘common-sense’ realism and Kant’s transcendental idealism. Putnam reads Kant as rejecting the then current metaphysical picture with its in-built assumptions of a unique, mind-independent world, and truth understood as correspondence between the mind and that ready-made world. Putnam reads Kant as ove...