LOGIC AND PHILOSOPHY

AHSEC CLASS 11 - QUESTION PAPER 2017

The figures in the margin indicate full marks for the questions.

Section 1 (12 Marks)

1. Answer the following as directed: (1 × 12 = 12)

1. “Logic is a normative science.” Is the statement correct?
2. Find out the correct answer: Logic is a science / an art / both.
3. Fill up the blank: The sign of relation between subject term and predicate term is known as _______.
4. State one important point of difference between sentence and proposition.
5. How many valid moods are there in the third figure of a syllogism?
6. How is the figure of a syllogism determined?
7. What is the name of the predicate of the conclusion of syllogism?
8. Under what conditions, a disjunctive function becomes false?
9. Which of the following philosophers is an empiricist? Descartes; Leibniz; Spinoza; Hume
10. Who regarded mind as ‘a clean slate’?
11. How many Pramanas are accepted in the Nyaya System?
12. Who refuted the theory of innate ideas?

Section 2

2. State two utilities of using symbols in logic. 2
3. Define universal proposition with suitable examples. 2
4. Define figure. 2
5. Name two valid moods of the fourth figure. 2
6. Reduce any one of the following sentences into proper logical form and state the distributed terms or terms in that proposition: 4
   (a) Most students are not hardworking.
   (b) Every man is mortal.
7. Give example of BARBARA. 2
8. State two characteristics of deductive inference. 2
9. Define mediate inference. 2
   
   Or
   Give example of syllogism. 2
10. State one point of difference between first figure and second figure of a syllogism. 2
11. “One of the characteristics of Indian philosophy is practical necessity.” State one reason in support of the statement. 2
12. Name any two non-Vedic systems of Indian philosophy. 2

Section 3

13. Distinguish between categorical proposition and conditional proposition. 4
    
    Or
    Write a short note on four-fold classification of proposition. 4
14. State various forms of compound proposition with suitable examples. 4
    
    Or
    State various forms of general proposition with suitable examples. 4
15. Describe the structure of categorical syllogism. 4
    
    Or
    Test the validity of any one of the following arguments: 4
    (a) We are dependent on our cars. Our cars are dependent on drivers. Therefore, we are dependent on drivers.
    (b) Only honest persons are happy; John is honest. Therefore, John is happy.
16. Construct truth table for any one of the following statements and find out whether it is tautologous, contradictory or contingent: 4
    1. \( (p \vee p) \supset p \)
    2. \( (p \supset q) \cdot (\sim p \cdot \sim q) \)
    3. \( \sim (p \cdot q) \vee \sim q \)
    4. \( \sim p \vee q \)
    
    
    Or
    Write short note on any one of the following:
    (a) Use of variables.
    (b) Truth function.
17. Symbolize any two of the following questions: 4
    (a) It is not that Smita is not good.
    (b) Either Karl Popper is a logician or he is a philosopher.
    (c) If you read hard, you will pass in the examination.
18. Define philosophy. State the nature of philosophy. 4
19. Explain any two important features of Indian philosophy. 4
20. Briefly explain how Locke refuted Descartes’ innate ideas. 4
21. State four characteristics of empiricism. 4
22. Explain two features of scientific realism. 4

Section 4

23. Describe the nature of logic. 6
    
    Or
    Discuss the points of difference between classical logic and symbolic logic. 6
24. What is symbolic logic? Describe its nature. 6
    
    Or
    What are the basic truth functions? Construct truth table for negative and equivalent truth functions. 6
25. Explain three points of difference between philosophy and metaphysics. 6
    
    Or
    Explain three points of difference between philosophy and epistemology. 6
26. Briefly explain Berkeleyan idealism. 6
    
    Or
    What is realism? Discuss four characteristics of realism. 6