Given the theory's scope, the following report of tests may appear inordinately brief, and all the more so because the chapter extends to comments on methodological considerations that transcend the theory. The brevity is due to the use of a formal mode of theory construction. In particular, the theory's extrinsic part identifies the kinds of data needed to test the theorems, and the test procedure is given by the formal mode that was used to state the theory (see Appendix, pp. 333-343).