 If ‘respects every doctor’ and ‘respects some liar’ indicate nonrelational proposition-parts, much like ‘is sick’ or ‘is happy’, then inference (11) has the following form ‘Some P is S, and some D is L; so some P is H’. But this schema, which fails to reflect the quantificational structure within the predicates is not valid. Its instances include bad inferences like the following: some patient is sick, and some doctor is a liar; so some patient is happy. This dramatizes the point that ‘respects every doctor’ and ‘respects some liar’ are—unlike ‘is sick’ and ‘is tall’—logically related in a way that matters given the second premise of (11).