43 lines
862 B
Markdown
43 lines
862 B
Markdown
**Test Yourself**
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Page 73
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1. An _and_ statement is true when, and only when, both components are _______.
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**Solution**
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True.
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2. An _or_ statement is false when, and only when, both components are _______.
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**Solution**
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False.
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3. Two statement forms are logically equivalent when, and only when, they always
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have _______.
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**Solution**
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The same truth values.
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4. De Morgan's laws says (1) that the negation of an _and_ statement is
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logically equivalent to the _______ statement in which each component is
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_______, and (2) that the negation of an _or_ statement is logically
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equivalent to the _______ statement in which each component is _______.
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**Solution**
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or; negated; and; negated.
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5. A tautology is a statement that is always _______.
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**Solution**
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true
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6. A contradiction is a statement that is always _______.
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**Solution**
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false
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