Some predicates are compound descriptions, not single nouns. The whole predicate must become the new subject, rather than a fragment of it.
Example:
Original: “Some students are in the library.”
Invalid word reversal: “Some libraries are students.”
Meaning-preserving converse: “Some people in the library are students.”
“People in the library” captures the complete predicative description. This clarifies the source’s discussion of objections involving a composite predicate.
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Simple Conversion: Definition, Categorical Rules and Reductio
Some predicates are compound descriptions, not single nouns. The whole predicate must become the new subject, rather than a fragment of it.
Example:
Original: “Some students are in the library.”
Invalid word reversal: “Some libraries are students.”
Meaning-preserving converse: “Some people in the library are students.”
“People in the library” captures the complete predicative description. This clarifies the source’s discussion of objections involving a composite predicate.