 Similarly, Bayne and Chalmers (2003: 24–7) distinguish objectual unity (a matter of two conscious experiences of one object, so different from Tye’s object unity), spatial unity, subject unity, and subsumptive unity, the last a matter of two or more conscious states becoming aspects of a single conscious state. Then within subsumptive unity, they distinguish between access unity and phenomenal unity. We just examined their definition of the latter. As is true of Tye, it is what mainly interests them. Two conscious states are phenomenally unified “if there is something it is like for the subject to be in both conscious states simultaneously”. 