Several recent papers dealing with Plato's position on the imperfection of the phenomenal world draw heavily on the differences between two kinds of predicates in order to show the following: (1) In the middle dialogues, Plato posits Forms only (or primarily) as referents of what the writers call incomplete predicates (e.g., relational or attributive ones). He does not posit Forms as referents for complete predicates (e.g., sortal or mass predicates). (2) When interpreters ignore the differences between these kinds of predicates, they ascribe too radical a view regarding the imperfection of the phenomenal world to the middle dialogues. (3) The ontology of these dialogues includes sensible particulars which retain their identity over time even though they are continually changing in some respect or other.