Why does george lie about lennie's mental deficiency?

My cat and my dog like best friends

What is implied in this sentence from mark twain's "the £1,000,000 bank-note"? i was puzzled, and wanted to discuss the matter a little further, but they didn't; so i took my leave, feeling hurt and insulted to be made the butt of what was apparently some kind of a practical joke, and yet obliged to put up with it, not being in circumstances to resent affronts from rich and strong folk.

In the revolution 2.0 note the wording of the protest guidelines.what word choices create a tone of reason and control? how might this tone affect the readers