21. Match the following:
List-I
List-II
a. Negation
1. Not
b. Disjunctive
2. Or
c. Conjunction
3. And
d. Hypothetical
4. If and then
List-I | List-II |
a. Negation | 1. Not |
b. Disjunctive | 2. Or |
c. Conjunction | 3. And |
d. Hypothetical | 4. If and then |
22. Mathematical theory consists of which system?
23. Rules of replacement is used for compound statements when we want to replace them without changing the truth value:
24. Match List-I with List-II and select the correct answer:
List-I
List-II
a. Exportation
1. (p ⊃ q) ≡ (q ∼ ⊃ ∼p)
b. Tautology
2. (p ⊃ q) ≡ (∼ p ∨ q)
c. Transposition
3. p ≡ (p.p)
d. Material implication
4. [(p.q) ⊃ r] ≡ [p ⊃ (q ⊃ r)]
List-I | List-II |
a. Exportation | 1. (p ⊃ q) ≡ (q ∼ ⊃ ∼p) |
b. Tautology | 2. (p ⊃ q) ≡ (∼ p ∨ q) |
c. Transposition | 3. p ≡ (p.p) |
d. Material implication | 4. [(p.q) ⊃ r] ≡ [p ⊃ (q ⊃ r)] |
25. Axiomatic system is known as what?
26. What is the task of a logical operator?
27. Proposition logic involves
1. logical connectives
2. non-logical connectives
3. words like and
4. words like or
Select the correct answer:
1. logical connectives
2. non-logical connectives
3. words like and
4. words like or
Select the correct answer:
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