A Concise Introduction to Logic (12th Edition) by Patrick J. Hurley

By Patrick J. Hurley

Unsurpassed for its readability and comprehensiveness, Hurley's A CONCISE creation TO common sense is the number 1 introductory common sense ebook out there. during this 12th version, Hurley maintains to construct upon the culture of a lucid, targeted, and obtainable presentation of the elemental subject material of good judgment, either formal and casual. The edition's new Previews attach a section's content material to real-life eventualities, utilizing daily examples to "translate" new notions and phrases into recommendations that readers unexpected with the subject material can relate to. an in depth, conscientiously sequenced selection of workouts courses readers towards better skillability with the talents they're studying

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By Patrick J. Hurley

Unsurpassed for its readability and comprehensiveness, Hurley's A CONCISE creation TO common sense is the number 1 introductory common sense ebook out there. during this 12th version, Hurley maintains to construct upon the culture of a lucid, targeted, and obtainable presentation of the elemental subject material of good judgment, either formal and casual. The edition's new Previews attach a section's content material to real-life eventualities, utilizing daily examples to "translate" new notions and phrases into recommendations that readers unexpected with the subject material can relate to. an in depth, conscientiously sequenced selection of workouts courses readers towards better skillability with the talents they're studying

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Extra info for A Concise Introduction to Logic (12th Edition)

Example text

The difference between sufficient and necessary conditions is a bit tricky. So, to clarify the idea further, suppose you are given a large, closed cardboard box. Also, suppose you are told there is a dog in the box. Then you know for sure there is an animal in the box. No additional information is needed to draw this conclusion. This means that being a dog is sufficient for being an animal. However, being a dog is not necessary for being an animal, because if you are told that the box contains a cat, you can conclude with equal certainty that it contains an animal.

The premise or premises set forth the alleged evidence or reasons, and the conclusion asserts what is claimed to follow from the alleged evidence or reasons. This definition of an argument expresses what is needed for a passage to contain an argument: 1. At least one of the statements must claim to present evidence or reasons. 2. There must be a claim that the alleged evidence supports or implies something— that is, a claim that something follows from the alleged evidence or reasons. It is not necessary that the premises present actual evidence or true reasons nor that the premises actually support the conclusion.

The component statement immediately following the “if ” is called the antecedent, and the one following the “then” is called the consequent. ” In both of these examples, there is a meaningful relationship between antecedent and consequent. However, such a relationship need not exist for a statement to count as conditional. The statement “If Janet Jackson is a singer, then Denver is in Colorado” is just as much a conditional statement as those about professional football and Roger Federer. Conditional statements Antecedent If Consequent then Consequent if .

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