 William Bechtel and Jennifer Mundale (1999) provide extensive empirical details about hypothesized or assumed brain type-identities across species in neuroscientific practice. Their explicit target is a methodological consequence sometimes drawn from the multiple realizability premise: if psychological states are multiply realized across biological species, then neuroscience will be of little use toward understanding cognition. But as details of the neuroscience of vision demonstrate, neuroscientists have successfully used understanding of the brain to decompose visual function. The neuroscientific goal has been to