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Introductory Logic Vocab

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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A statement cannot be both true and false

2. The condition - the part following the 'if'

3. A sentence which is either true or false

4. Two statements are logically equivalent if they imply one another

5. A question crafted to exclude any possible legitimate response

6. A statement that affirms an outcome based on a condition.

7. Is valid and has true premises

8. Difference of opinion or perception

9. A verbal disagreement is a misunderstanding due to differing definitions to differing definitions for one or more words

10. A popular but invalid (or unhelpful) form of argument

11. The extention of a term is the sum of all the individual objects described by it

12. A real disagreement is an actual inconsistancy between two statements: they cannot both be true at the same time

13. Two statements are independant if the truth or falsity of one has no effect on the truth or falsity of the other

14. 'it does not follow'; that an argument is invalid

15. The result of the condition - the part after the 'then'

16. An illegitimate appeal to force

17. The subject of a statement is the term being described - or about which something is asserted

18. Two statements are consistent if they can both be true at the same time

19. Making an argument based on a false dilemma

20. Points to an inconsistency between a person's argument and behavior

21. An illegimate appeal to authority

22. Contains the minor term

23. A verbal attack on a person rather than his argument

24. Deductive argument consisting of three statements in categorical form that together use only three terms - called the major - minor - and middle

25. A word is ambiguous if it has more than one possible meaning

26. Arguments that confuse the real issue with multiple - vague - or otherwise unclear meanings

27. Reasoning with probability from examples or experience to general rules

28. A statement that reverses and negates both the subject and predicate of the original

29. Two statements are contrary if and only if they can both be false but cannot both be true

30. An argument based merely on the passage of time

31. A vagueness of grammar that disguises or alters meaning

32. A self-supporting statement is a statement whose truth value can be determined from the statement itself

33. Improperly assuming that a sequence in time implies a cause and effect

34. A word - often a relative pronoun or adverb - that refers to a broad range of things or times

35. The fallacy of transferring attributes from part to whole

36. A diagram of the basic relationships between statements with the same subject and predicate

37. The relationship between a universal and particular statement of the same quality - in which the falsity of the particular necessitates the falsity of the universal

38. A number from 1 to 4 identifying the placement of its middle term

39. Arguments that fail to establish their conclusions because of a weakness in logical structure

40. A statement that reverses the subject and predicate

41. When there appears to be inconsistency - we have a disagreement

42. Found once in each premise

43. The conclusion of an argument is the statement which appears to be implied by the other statements in the argument - which are called premises

44. A representation of a syllogism - having statements in standard order with standard abbreviations of its terms

45. Changing the definition of a term in the middle of an argument

46. Secretly assuming what you are trying to prove

47. The science and art of reasoning well

48. Two statements are subcontraries if and only if both can be true but both cannot be false

49. An argument in which a statement is unstated and assumed. Specifically - it is a syllogism with one assumed statement

50. A tautology is a statement which is always true because of its logical structure