2014
(November)
PHILOSOPHY
(Major)
Course: 502
(Logic - Western)
Full Marks: 80
Pass Marks: 32
Time: 3 hours
The figures in the margin indicate full marks for the questions
1. Find out the correct answer: 1x8=8
- There are three/four types of square of opposition.
- If either premise of a valid standard form of categorical syllogism is negative, the conclusion must be affirmative/ negative.
- When the truth value of is true and the truth value of is false, then the truth value of will be true/false.
- There are three/four laws of thought according to traditional logicians.
- The symbolic expression of the phrase given any is.
- J. S. Mill formulated four/five kinds of inductive canons.
- There are three kinds of hypothesis according to Bain/L. S. Stebbing.
- According to Lotze, hypothesis is a law/a real agent.
2. Write short notes on any four of the following: 4x4=16
- Subject-predicate form of proposition.
- Fallacy of four terms.
- Propositional logic.
- Disjunctive function.
- Summative induction.
3. Distinguish between truth and validity. Is logic concerned with truth or with validity? 9+2=11
Or
What is compound proposition? Explain with examples the various kinds of compound proposition. 3+8=11
4. State the nature and structure of standard form of categorical syllogism. Explain the existential fallacy. 8+4=12
Or
What is Venn diagram? Explain and illustrate the Venn diagram technique for testing the validity of syllogism. 2+10=12
5. Construct truth table for the following and find out whether they are tautologies, contradictions or contingent expressions:
- 2
- 2
- 2
- 2
- 3
Or
Construct formal proof of validity for the following: 5 ½ x2=11
6. Explain and illustrate the symbolization of traditional categorical proposition. 11
Or
What do you mean by quantification? Explain with illustration the connection between universal and existential quantification. 3+8=11
7. Define hypothesis. Discuss the conditions necessary for a valid hypothesis. 3+8=11
Or
State and explain with examples Mill’s method of difference. Is it useful in scientific investigation? 10+1=11
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