  While Russell (1905) echoed (without acknowledgment) Aristotle's ambiguist analysis of negation as either contradictory (“external”) or contrary (“internal”), by virtue of the two logical forms assigned to “The king of France is not bald” (see descriptions), such propositionalized accounts are bought at a cost of naturalness, as singular sentences of subject-predicate grammatical form are assigned the logical form of an existentially quantified conjunction and as names are transmuted into predicates. 