The men John F. Kennedy and Ronald Reagan are related to the term President of the US as follows:

A. It occurs in an equative sentence.

B. It can be used to refer to different potential referents.

C. It never refers to different things or different persons.

D. It is not a referring expression.

A. Entailment

B. Paraphrase

C. Synonymy

D. Hyponymy

A. Same - different

B. Give - take

C. Conceal - reveal

D. Beautiful - ugly

A. Bachelors are innocent men.

B. Bachelors are not human beings.

C. Bachelors are never married.

D. Bachelors are male.

A. Extension

B. Prototype

C. Stereotype

D. All of the above

A. Analyticity is a sense property of predicates.

B. Contradiction is a sense relation between predicates.

C. Syntheticity is a sense property of a sentence.

D. Contradiction is a sense relation between sentences.

A. Sentence

B. Utterance

C. Proposition

D. a and c