Chapter 5, Level 2 Self Quiz: E

Quiz Content

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. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some dogs are not Dalmatians.
Converse: Some Dalmatians are not dogs.

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. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some dogs are not Dalmatians.
Obverse: Some dogs are non-Dalmatians.

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. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some dogs are not Dalmatians.
Contrapositive: Some non-Dalmatians are not non-dogs.

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. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All cars are engineered objects.
Converse: All engineered objects are cars.

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. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All cars are engineered objects.
Obverse: No cars are non-engineered objects.

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. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No politicians are people with integrity.
Converse: No people with integrity are politicians.

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. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No politicians are people with integrity.
Obverse: All politicians are non-people with integrity.

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. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No politicians are people with integrity.
Contrapositive: No non-people with integrity are non-politicians.

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. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some friends are not honest people.
Converse: Some honest people are not friends.

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. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some friends are not honest people.
Obverse: Some friends are non-honest people.

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. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some friends are not honest people.
Contrapositive: Some non-honest people are not non-friends.

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. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All autoworkers are people in unions.
Converse: All people in unions are autoworkers.

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. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All autoworkers are people in unions.
Obverse: No autoworkers are non-people in unions.

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. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All autoworkers are people in unions.
Contrapositive: All non-people in unions are non-autoworkers.

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