Transcribed below. The typewriter is a 1949 Royal Quiet De Luxe with Pica type.

Principles of Rhetoric.

If you have no idea what to say,
     Say it with force.
If the argument won’t go your way,
     Add an “of course.”
If you just can’t quite think of the word,
     Then you should shout.
If your statement is proved quite absurd,
     Then you can pout.