Chapter 5, Level 1 Self Quiz: E

. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No greedy politicians are people likely to go to prison.
Converse: No people likely to go to prison are greedy politicians.

. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No greedy politicians are people likely to go to prison.
Obverse: All greedy politicians are non-people likely to go to prison.

. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No greedy politicians are people likely to go to prison.
Contrapositive: No non-people likely to go to prison are non-greedy politicians.

. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All public holidays are days when banks close.
Converse: All days when banks close are public holidays.

. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All public holidays are days when banks close.
Obverse: No public holidays are non-days when banks close.

. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All public holidays are days when banks close.
Contrapositive: All non-days when banks close are non-public holidays.

. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No ice cream toppings are diet-busters.
Converse: No diet-busters are ice cream toppings.

. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No ice cream toppings are diet-busters.
Obverse: All ice cream toppings are non-diet-busters.

.

The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.

No ice cream toppings are diet-busters.

Contrapositive: No non-diet-busters are non-ice cream toppings.

. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All French fries are grease-laden products.
Converse: All grease-laden products are French fries.

.

The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.

All French fries are grease-laden products.

Obverse: No French fries are non-grease-laden products.

. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
All French fries are grease-laden products.
Contrapositive: All non–grease-laden products are non–French fries.

. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some tattoos are great works of art.
Converse: Some great works of art are tattoos.

. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some tattoos are great works of art.
Obverse: Some tattoos are not non-great works of art.

. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
Some tattoos are great works of art.
Contrapositive: Some non-great works of art are non-tattoos.

. The converse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No good deeds are acts left unrewarded.
Converse: No acts left unrewarded are good deeds.

. The obverse is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No good deeds are acts left unrewarded.
Obverse: All good deeds are non-acts left unrewarded.

. The contrapositive is given for the following proposition. Determine whether the subsequent immediate inference is valid or invalid.
No good deeds are acts left unrewarded.
Contrapositive: No non-acts left unrewarded are non-good deeds.

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