 The term “proprietary” is due to David Pitt (2004). Thought has a proprietary phenomenal character just in case the phenomenal characters of thoughts are special or unique to thought, i.e., they are not perceptual, verbal, bodily, or affective phenomenal characters, or other phenomenal characters that are present in mental states other than thoughts. Following current usage, we call all of the aforementioned kinds of phenomenology sensory phenomenology and the putative proprietary phenomenology of thought cognitive phenomenology. The claim that thought has a proprietary phenomenology is then just the claim that it has a non-sensory phenomenology.