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"Once master the machinery of Symbolic Logic, and you have a mental occupation always at hand, of absorbing interest, and one that will be of real...
"Once master the machinery of Symbolic Logic, and you have a mental occupation always at hand, of absorbing interest, and one that will be of real use to you in any subject you may take up. It will give you clearness of thought - the ability to see your way through a puzzle - the habit of arranging your ideas in an orderly and get-at-able form - and, more valuable than all, the power to detect fallacies, and to tear to pieces the flimsy illogical arguments, which you will so continually encounter in books, in newspapers, in speeches, and even in sermons, and which so easily delude those who have never taken the trouble to master this fascinating Art." Lewis Carroll In each puzzle you are to write the assertions symbolically as implications, along with their contrapositives, and then string together with arrows all the assertions to arrive at a final conclusion. Your answer will be an ultimate implication, which you must then cleverly translate back into ordinary language.
a. The only books in this library, that I do not recommend for reading, are unhealthy in tone. The bound books are all well written. All the romances are healthy in tone. I do not recommend you to read any of the unbound books.
b. Animals, that do not kick, are always unexcitable. Donkeys have no horns. A buffalo can always toss one over a gate. No animals that kick are easy to swallow. No hornless animal can toss one over a gate. All animals are excitable, except buffaloes.
c. I despise anything that cannot be used as a bridge. Everything, that is worth writing an ode to, would be a welcome gift to me. A rainbow will not bear the weight of a wheelbarrow. Whatever can be used as a bridge will bear the weight of a wheelbarrow. I would not take, as a gift, a thing that I despise.
d. No one, who is going to a party, ever fails to brush his hair. No one looks fascinating, if he is untidy. Opium eaters have no self-command. Everyone, who has brushed his hair, looks fascinating. No one wears white kid gloves, unless he is going to a party. A man is always untidy, if he has no self-command.
