Joe Lau

Courses.2012bCCHU9005quiz-ans History

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March 13, 2013, at 09:38 AM by 42.2.245.23 -
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- FALSE
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* FALSE
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- FALSE
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* FALSE
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- TRUE
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* TRUE
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- FALSE
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* FALSE
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- Not valid
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* Not valid
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- Valid
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* Valid
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- Not valid
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* Not valid
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- None of the above
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* None of the above
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- The conclusion cannot be false if the premises are true
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* The conclusion cannot be false if the premises are true
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- Invalid
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* Invalid
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- Invalid
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* Invalid
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- Valid
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* Valid
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- Nothing that I like is wrong.
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* Nothing that I like is wrong.
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March 13, 2013, at 09:37 AM by 42.2.245.23 -
Added lines 1-2:
!Answers to online quiz
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March 13, 2013, at 09:37 AM by 42.2.245.23 -
Added lines 1-40:
An argument with a false conclusion must be invalid.
- FALSE

An argument with false premises must be invalid.
-  FALSE

An argument with true premises and a false conclusion must be invalid.
- TRUE

An argument with true premises and a true conclusion cannot be invalid.
- FALSE

(1) If pigs are animals, then pigs can fly. (2) Pigs can fly. (3) So pigs are animals.
- Not valid

(1) If pigs are animals, then pigs can fly. (2) Pigs are animals. (3) So pigs can fly.
- Valid

(1) Most insects are organisms with wings. (2) Most organisms with wings have more than two legs. (3) So most insects have more than two legs.
- Not valid

Suppose an argument has true premises and a true conclusion. Then:
- None of the above

Suppose an argument is valid and the conclusion is true. Then:
- The conclusion cannot be false if the premises are true

(1) Either Tom is sad or Tom is not sad. (2) Tom is not sad. (3) So Tom is happy.
- Invalid

(1) Chemical E4786 causes cancer in human beings. (2) Bread from company X includes E4786. (3) So company X should not have put E4786 in bread.
- Invalid

(1) Every burger contains meat. (2) Meat contains protein. (3) So every burger contains protein.
- Valid

"I like eating meat. So eating meat is not wrong." Find a missing premise that makes the argument valid.
- Nothing that I like is wrong.

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