 where p represents some state of affairs Y finds beneficial. Sean McAleer (2012) calls the attitude expressed by this type of locution propositional gratitude. Prepositional gratitude is essentially a “triadic” or three-place relation between Y, R, and φ. Propositional gratitude, by contrast, is a “dyadic” or two-place relation between Y and some good state of affairs p. Propositional gratitude is best understood as the proper response to a good state of affairs. Prepositional gratitude, on the other hand, is the proper response to something more specific: a benefactor’s doing or having done something beneficial for the beneficiary. Unlike propositional gratitude, prepositional gratitude is an essentially interpersonal phenomenon.