# A Concise Introduction to Logic (11th Edition) by Patrick J. Hurley

By Patrick J. Hurley

Unsurpassed for its readability and comprehensiveness, Hurley's A CONCISE advent TO good judgment is the number one introductory good judgment textbook available in the market. during this 11th version, Hurley keeps to construct upon the culture of a lucid, centred, and available presentation of the fundamental subject material of common sense, either formal and casual. Hurley's huge, rigorously sequenced selection of workouts proceed to lead scholars towards larger talent with the talents they're studying.

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**Example text**

1 of this book, and the Summulae Logicales of Peter of Spain (ca. 1205–1277) became the standard textbook in logic for three hundred years. However, the most original contributions from this period were made by William of Ockham (ca. 1285–1347). Ockham extended the theory of modal logic, conducted an exhaustive study of the forms of valid and invalid syllogisms, and further developed the idea of a metalanguage, a higher-level language used to discuss linguistic entities such as words, terms, and propositions.

History has shown repeatedly that you cannot legislate morality, nor does anyone have a right to. The real problem is the people who have a vested interest in sustaining the multibillion-dollar drug industry created by the laws against drugs. The legalization of drugs would remove the thrill of breaking the law; it would end the suﬀering caused by unmetered doses, impurities, and substandard paraphernalia. A huge segment of the underground and extralegal economy would move into a legitimate economy, taking money away from criminals, eliminating crime and violence, and restoring many talented people to useful endeavor.

Thus, these passages can be correctly interpreted as both an explanation and an argument. Perhaps the greatest problem confronting the eﬀort to distinguish explanations from arguments lies in determining whether something is an accepted matter of fact. Obviously, what is accepted by one person may not be accepted by another. Thus, the eﬀort often involves determining which person or group of people the passage is directed to—the intended audience. ) will decide the issue. But when the passage is taken totally out of context, ascertaining the source may prove impossible.