Proposition, Impersonal, Third-Person

Respect for Subject-Verb agreement in the standard Propositional formulation, i. e. 'S is P', not 'S am P', implies acceptance of the classification of its Subject as a grammatical 'Third Person'.  But Thirdness implies priority of Firstness and Secondness.  Thus, likewise, any grammatical Third-Person Subject implies the priority of an 'I' and a 'You' to it.  It therefore indicates that a presumed 'impersonal' Proposition, e. g. that of Logicism, is the product of an abstraction of a Third-Person formulation from the context of First- and Second-Person interaction, i. e. from Communication.