CHAPTER 4

 

Logic notes: 4.1 & 4.2


 

EXERCISE 4.1

1. some---executive pay packages---are---insults...workers

4. some---preachers...berliefs---are not---television evangelists.

7. No---sex....competently---are---programs...morals

 

EXERCISE 4.2

I

 

1. E---Universal---Neg.---both distributed.

4. 0---particular---neg.---sub. undistributed, predicate distributed

7. I---particular---positive---neither distributed

 

II

1. No drunk drivers are threats to...highway.

4. Some CIA operatives are champions...rights.

 

III

1. Some owners of pit bull terriors are persons who....lawsuits.

4. No residents of Manhatten are people....there.

 

IV

1. Some oil spills are not events...environments.

4. All corporate lawyers are persons...conscience.

 

EXERCISE 4.3

II.

1. Invalid, illicit contrary

4. Valid, unsound

7. Valid, sound

10. Valid, sound

13. Valid, my guess--unsound...

 

EXERCISE 4.5

(Section I)

1a. F

b.T

c. F

4a. U

b. T

c. U

7a. F

b. U

c. U

(Section II)

1. Valid, unsound

4. Invalid, existential fallacy , unsound

7. Invalid (illicit contrary), unsound

10. Invalid (Illicit subcontrary), unsound

13. Invalid (Existential fallacy), unsound

(section III)

1. Valid, unsound

4. valid, unsound

7. invalid, existential fallacy, unsound

invalid, illicit subcontrary, unsound