Abstract

On Peirce’ view, we can perceive many things commonly thought not to be perceptible—or thought to be ‘abstract’—including but not necessarily limited to (some) generals or universals, habits or law-like properties, modal properties, and semeiotic properties (sign relations). My contention turns on his arguments in ‘Some Consequences’ that ‘no cognition of ours is absolutely determinate’, his mature account of perception, particularly his criteria for what counts as perception and what does not, his analysis of the predication of concepts (i.e. his pragmaticism), his claims in the 1903 Harvard lectures that we directly perceive Thirdness, and his realism about generals, habits, modalities, and sign relations.