5.
(1) No ducks waltz;
(2) No officers ever decline to waltz;
(3) All my poultry are ducks.
Univ. “creatures”; a = ducks; b = my poultry; c = officers; d = willing to waltz.
6.
(1) Every one who is sane can do Logic;
(2) No lunatics are fit to serve on a jury;
(3) None of your sons can do Logic.
Univ. “persons”; a = able to do Logic; b = fit to serve on a jury; c = sane; d = your sons.
[pg113] 7.
(1) There are no pencils of mine in this box;
(2) No sugar-plums of mine are cigars;
(3) The whole of my property, that is not in this box, consists of cigars.
Univ. “things of mine”; a = cigars; b = in this box; c = pencils; d = sugar-plums.