Third Examination - Introductory Logic

Section One: Identify the Mood and figure of the following syllogisms

1. All Snow is white
   All Clouds are white
   \All Clouds are snow
   
   
   

2. Some philosophers are not lechers
   Some lechers are rock stars
   \Some rock stars are philosophers
   
   

3. No marines are cowards
   All cowards are northerners
   \Some northerners are not marines

Section Two: Put the following syllogisms into standard form and identify the mood and figure

4. No tropical beaches are places which get snow, so no ski resorts are tropical beaches, since all ski resorts are places which get snow.
   
   
   
   
5. Some drug abusers are not addicts, all addicts are New Yorkers, so some drug abusers are not New Yorkers.
   
   
   
   
6. Some people who are punished are people who are having fun, since all wicked people are people who are being punished, and some wicked people are people who are having fun.
   
   
   

Section Three: Translate the following moods and figures into standard form syllogisms using S for the subject, P for the predicate, and M for the middle term.

7. IOA-2
   
   
   
   
   
8. OEA-3
   
   
   
   
   
9. AIO-1
   
   
   
   
   
10. EIE-4
    
    
    
    
    
    
11. OIA-3
    
    
    
    

Section Four: Translate the following syllogisms into standard form and indicate the mood and figure. For those which are invalid construct a counter-example.

12. All greeks are mortal, for all human beings are mortal, and all greeks are human beings.
    
    
    
    
    
    
13. All New Yorkers are baby killers, so some baby killers are not vegetarians, since some New Yorkers are not vegetarians.
    
    
    
    
    
    
14. No sex-crazed maniacs are satiated people, and all people in this logic class are satiated people, so some people in this logic are not sex-crazed maniacs.
    
    
    
    

Section Five: Diagram these syllogisms using Venn diagrams and indicate which are valid and which are invalid

15. OEE-4
    
    
    
    
16. IOE-2
    
    
    
    
17. OAO-3
    
    
    
    
18. EIE-1
    
    
    
    

Section Six: Using the six rules for valid standard form categorical syllogisms identify and explain which of the following syllogisms are invalid by indicating how they violate a certain rule.

19. All busy bodies are annoying people
    All Yankees are busy bodies
    \Some Yankees are annoying people
    
    
    
20. No good football players are players who will be traded
    No New Orleans Saints are good football players
    \ No New Orleans Saints are players who will be traded
    
    
    
21. Some talk show hosts are not nice people
    All nice people are caring individuals
    \Some caring individuals are talk show hosts
    
    
    
22. All dinosaurs are extinct creatures
    Some carnivores are not dinosaurs
    \Some carnivores are not extinct creatures
    
    
    
23. Some happy people are optimists
    All clergymen are optimists
    \Some clergymen are happy people
    
    
    
24. All mothers are sweet things
    Some fruits are not sweet things
    \Some fruits are not mothers
    
    
    
25. All good things are things which will end
    No good things are unhappy events
    \No unhappy events are things which will end