Mark, on a large Diagram, the following Pairs of Propositions: then mark a small Diagram, &c. These are, in fact, Pairs of PREMISSES for Syllogisms: and the results, read off from the small Diagram, are the CONCLUSIONS.
- No exciting books suit feverish patients; Unexciting books make one drowsy.
- Some, who deserve the fair, get their deserts; None but the brave deserve the fair.
- No children are patient; No impatient person can sit still.
[See pp. 72-5]
- All pigs are fat; No skeletons are fat.
- No monkeys are soldiers; All monkeys are mischievous.
- None of my cousins are just; No judges are unjust.
- Some days are rainy; Rainy days are tiresome.
- All medicine is nasty; Senna is a medicine.
- Some Jews are rich; All Patagonians are Gentiles.
- All teetotalers like sugar; No nightingale drinks wine.
- No muffins are wholesome; All buns are unwholesome.
- No fat creatures run well; Some greyhounds run well.
- All soldiers march; Some youths are not soldiers.
- Sugar is sweet; Salt is not sweet.
- Some eggs are hard-boiled; No eggs are uncrackable.
- There are no Jews in the house; There are no Gentiles in the garden.
[See pp. 75-82]
- All battles are noisy; What makes no noise may escape notice.
- No Jews are mad; All Rabbis are Jews.
- There are no fish that cannot swim; Some skates are fish.
- All passionate people are unreasonable; Some orators are passionate.
[See pp. 82-84]