First, he noted that a sentence should express, rather than be, a complete thought.

A proposition is a sentence expressing something true or false.

Two distinct sentences expressed in different words can express the same meaning.

These six sentences express one and the same indivisible phenomenon.

As there is no zebra in the game, his sentence expressed an impossibility.

Cognitivists believe that these sentences do not just express feelings, as though we were saying, "Hey!"

A loose sentence expresses the main thought near the beginning and adds explanatory material as needed.

Some sentences expressing boring work are: "I'm doing the same thing over and over again."

Divine command theory - claims that ethical sentences express the attitudes of God.

The book's concluding sentence expresses the force and the limits of Professor West's vision.