What does it mean to embed the phenomena in an abstract structure? Or to represent them by doing so? The semantic view of theories runs into a severe problem if these notions are construed either naively, in a metaphysical way, or too closely on the pattern of the earlier syntactic view. Constructive empiricism and structural realism will then share those difficulties. The problem will be posed...

as to where between the two poles of behaviorism and structuralism they will finally see their science find its place. It has become ever more evident that psychology after all is one; that structuralism has long since been at its most structuralistic, and that behaviorism, born more than full-grown, has been rapidly progressing from senescence toward a more normal adolescence. Thia is hopeful,...