 Some philosophers have argued that experiences can’t have color-involving Russellian contents and can’t have location-involving contents on the grounds that this would allow phenomenally different experiences of colors and locations to have the same Russellian contents. These criticisms illustrate the appeal to the phenomenal adequacy constraint on contents. More exactly, they appeal to a way of specifying that constraint by holding that when two experiences are phenomenally the same, or are phenomenally the same in a respect, there should be some contents that they have in common. These criticisms are discussed in  Section 4.1  (color) and  Section 4.2  (location).