In this response to Stoffregen (target article, this issue), we express our concern that it might be misleading to think about either affordances or events as the phenomena (or objects) of study. We argue that the phenomenon of interest is the functional coupling of actors and environments. This is a multidimensional phenomenon. We discuss four important dimensions of this coupling (dynamic action constraints, static action constraints, information constraints, and value constraints). Stoffregen's observations illustrate a deep appreciation for these multiple dimensions and a concern that certain dimensions are being overlooked within particular research programs. We are less concerned about the limits of any particular piece of research but share Stoffregen's hope that a mature ecological research program will thrive on a healthy appreciation of the interactions among the four dimensions.