In this chapter constitution and constitutive phenomenology are interpreted using the unifying formalism. Constitution is treated as a relationship between immanent experiences of objects and the counter-factual trail sets that determine them. Constitution as a developmental, "constructive" process (which relies on the learning rule) is described, as is the notion that constitutive phenomenology is a research program, which extends beyond the case of visually perceived physical things to encompass all categories of given object.