Logic is concerned with the truth-value of sentences. Grammar is concerned with the communications-value of sentences. Rhetoric is concerned with the persuasion-value of sentences. And heresthetic is concerned with the strategy-value of sentences. In each case, the art involves the use of language to accomplish some purpose: to arrive at truth, to communicate, to persuade, and to manipulate.

He's good at some sports, like tennis, but he's just miserable at football.

My head was pounding.

The Mongol capture of the Sung city of Hsiang-yang is an excellent example of the sophisticated siege techniques used in Kublai Khan's time.