Introductory Logic

2. The term found once in each premise.
3. Statements who always have opposite truth values.
6. If a statement is true, then it is true.
7. A term, within a statement, that refers to all members of its category.
10. Any statement is either true or false.
15. The science and art of reasoning well.
16. Two statements that can both be false but cannot both be true.
19. A statement that is always true by logical structure.
21. A syllogism is _____ if and only if the premises imply the conclusion.
22. A syllogism of the same form as the original, but with obviously true premises and an obviously false conclusion, used to show the original to be invalid.
23. The _____ _____ of a syllogism is the subject of the conclusion and is used in the premise not containing the major term.
24. A statement that gives the meaning of a term.
25. Reasoning with certainty from premises to conclusions.
26. The relationship between a universal and particular statement of the same quality, in which the truth of the universal necessitates the truth of the particular.
27. A syllogism that is valid and has true premises.

1. A statement that affirms or denies something about a given subject.
4. The premise containing the major term.
5. A set of statements, one of which appears to be implied or supported by the others.
8. An actual inconsistency between 2 statements: they cannot both be true at the same time.
9. The _____ of a syllogism is a number from 1-4 identifying the placement of its middle term.
11. A diagram of the basic relationships between categorical statements with the same subject and predicate.
12. Deals with proper models of reasoning.
13. Two statements that can both be true at the same time.
14. The statements that support or imply the conclusion.
17. The scope of a statement's claim about the extension of the subject (universal or particular).
18. A concept that is expressed precisely in words.
20. A statement that is false due to its logical structure.