Introduction to Logic (2nd Edition) by Harry J. Gensler
By Harry J. Gensler
Publish yr note: First released in 2001 (first edition)
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Introduction to Logic combines most likely the broadest scope of any common sense textbook on hand with transparent, concise writing and fascinating examples and arguments.
Its key good points, all retained within the moment version, include:
• less complicated how you can try out arguments than these to be had in competing textbooks, together with the superstar try for syllogisms
• a large scope of fabrics, making it compatible for introductory common sense classes (as the first textual content) or intermediate periods (as the first or supplementary book)
• attractive and easy-to-understand examples and arguments, drawn from way of life in addition to from the nice philosophers
• a suitability for self-study and for guidance for standardized checks, just like the LSAT
• an affordable expense (a 3rd of the price of many competitors)
• routines that correspond to the LogiCola application, that may be downloaded at no cost from the web.
This Second Edition also:
• arranges chapters in a extra invaluable manner for college students, beginning with the best fabric after which progressively expanding in difficulty
• offers a fair broader scope with new chapters at the historical past of good judgment, deviant common sense, and the philosophy of logic
• expands the part on casual fallacies
• incorporates a extra exhaustive index and a brand new appendix on steered extra readings
• updates the LogiCola tutorial software, that is now extra visually beautiful in addition to more straightforward to obtain, set up, replace, and use.
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Additional info for Introduction to Logic (2nd Edition)
Sample text
10. a cop filthy rich heroic an extremist an elderly gentleman a bastard baloney a backward country authoritarian a do-gooder 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. a hair-splitter an egghead a bizarre idea a kid booze a gay abnormal bureaucracy abandoning me babbling 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 2 Lexical definitions We noted earlier that the phrase “cosmic force” in this example is obscure: If there’s a cosmic force, then there’s a God. There’s a cosmic force. Á There’s a God. Unless the speaker tells us what is meant by “cosmic force,” we won’t be able to understand what’s said or tell whether it’s true.
Some logic books use the Aristotelian view, but most use the modern view. It makes a difference in very few cases; all the syllogisms in this chapter prior to this section test out the same on either view. To adapt the star test to the Aristotelian view, word it so that each capital letter must be starred at least once (instead of “exactly once”). To adapt Venn diagrams to the Aristotelian view, add this rule: “If you have a circle with only one unshaded area, put an ‘×’ in this area”; this is equivalent to assuming that the circle in question isn’t entirely empty.
If they die, then this proves my claim. If they live, then this refutes my claim. We’d then understand Thales to be claiming that water is needed for life. Or suppose Thales replies this way: Let scientists work on the task of transforming each kind of matter (gold, rock, air, and so on) into water, and water back into each kind of matter. If they eventually succeed, then that proves my claim. Again, this would help us understand the claim. But suppose Thales says this: No conceivable experimental test could show my claim to be true or show it to be false.