The (almost really) Complete Works of Lewis Carroll

Symbolic Logic. Specimen-Syllogisms. Premisses

Source: printed 1894 in two editions, first with minor differences as noted

1. Nothing intelligible ever puzzles me;
Logic puzzles me.

2. Nothing, that is nice, need be shunned;
Some kinds of jam are nice.

3. Warmth relieves pain;
Nothing, that does not relieve pain, is useful in toothache.

4. No birds, except peacocks, are proud of their tails;
Some birds, that are proud of their tails, cannot sing.

5. All those bonbons are chocolate-creams;
All these bonbons are delicious.

6. No one, when exercising self-control, fails to keep his temper;
Some persons, when contradicted, keep their tempers.

7. Nothing in this book interest me;
This book consists entirely of easy riddles.

8. All clever people are popular;
All good-tempered people are popular.

9. No portrait of a lady, that makes her simper or scowl, is satisfactory.
No photograph of a lady ever fails to make her simper or scowl.

10. Those, who are fully occupied, never talk about their grievances;
Discontented people are always talking about their grievances.

11. No tall men have woolly hair;
All niggers have woolly hair.

12. Your course is always honest;
Your course is always the best policy.

13. All is not gold that glitters;
Glittering things dazzle the eyes.

14. I don’t believe everything he tells me;
I believe he is planning to go abroad.

15. All dogs of mine, that are not black, are valuable;
Some of my greyhounds have won prizes.

16. (1) No cats sing well;
(2) None of my household get any cream, unless they sing well;
(3) All cats get cream.

17. (1) All boots are leather;
(2) Anything made of buttered toast is good to eat;
(3) No leather boots are good to eat.

18. (1) No pins of mine, that will bend, are useful;
(2) Nothing made of steel will bend;
(3) All my useless pins are made of steel.

19. (1) Ungraceful creatures are thoughtful when left alone;
(2) No elephants are graceful;
(3) When one is disliked, one is left alone;
(4) Thoughtful elephants are universally liked;
(5) Ungraceful creatures, who are not fond of apples, are disliked.

20. (1) No invalids are unromantic civilians;
(2) All architects are dreamy enthusiasts;
(3) No lovers are unhappy;
(4) No military men are dreamy;
(5) All romantic enthusiasts are in love;
(6) All who live on muffins are unhappy invalids.

[Feb., 1894]