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380+ Symbolic Logic Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Arts in Philosophy (BA Philosophy) , Master of Arts in Philosophy (MA Philosophy) .

351.

Proposition is particular if the subject refers to only _______of the class

A. part
B. whole
C. wide
D. full
Answer» A. part
352.

A proposition ___________term, if it refers to all members of the class designated by the term

A. selects
B. distributes
C. exchange
D. negation
Answer» B. distributes
353.

An ________ proposition is said to distribute both subject and predicate terms

A. E
B. I
C. O
D. A
Answer» A. E
354.

A universal or particular affirmative proposition, do not distribute their_________term.

A. predicate
B. Negation
C. subject
D. disjunction
Answer» A. predicate
355.

A valid standard form categorical syllogism must contain exactly __________terms, each of which is used in the same sense throughout the argument.

A. Two
B. Three
C. Four
D. Five
Answer» B. Three
356.

The___________ of the class of all chairs is the class of all things that are not chairs.

A. Supplement
B. conjunction
C. sum
D. complement
Answer» D. complement
357.

Which of the following is the obverse of the proposition of the A proposition’ All S is P ‘

A. All S is Non P
B. No S is non P
C. Some S is non P
D. some S is P
Answer» B. No S is non P
358.

A statement form that has only false substitution instance is said to be

A. Tautology
B. Contradiction
C. Opposition
D. Contingent
Answer» B. Contradiction
359.

The statement form ~(p.q) is logically equivalent to

A. ~p v ~q
B. ~p.q
C. p.~q
D. ~P.~q
Answer» A. ~p v ~q
360.

The statement form p ↄ q is logically equivalent to

A. ~p ↄ ~q
B. ~q ↄ ~p
C. p v q
D. q ↄ p
Answer» B. ~q ↄ ~p
361.

[(p . q) ↄ r] is logically equivalent to which of the following

A. p ↄ (q ↄ r)
B. (p.q) v r
C. (p ↄ q) v r
D. p ↄ(qvr)
Answer» A. p ↄ (q ↄ r)
362.

The compound proposition in which the word ‘and’ is used to connect simple statements

A. Disjunction
B. implication
C. conjunction
D. negation
Answer» C. conjunction
363.

In the conditional , the component statement that follows ‘then’ is called

A. Antecedent
B. consequent
C. disjunct
D. complement
Answer» B. consequent
364.

The weak implication symbolized by Ɔ is called a

A. Disjunction
B. Material implication
C. Conjunction
D. Negation
Answer» B. Material implication
365.

Universal quantifier is symbolized as

A. x
B. (x)
C. Ǝx
D. (Ǝx)
Answer» B. (x)
366.

There is atleast one x such that x is mortal can be symbolized as

A. (x) Mx
B. (Ǝx)Mx
C. (x)
D. Ǝx
Answer» B. (Ǝx)Mx
367.

_____________ is the process of obtaining a proposition from a propositional function by substituting a constant for the variable.

A. Instantiation
B. Quantification
C. Deduction
D. Implication
Answer» A. Instantiation
368.

An error in reasoning is called _________

A. Affirmation
B. Quantification
C. Fallacy
D. Association
Answer» C. Fallacy
369.

Obversion is a valid __________inference, when applied to any standard form categorical proposition.

A. Mediate
B. Immediate
C. Minor
D. Major
Answer» B. Immediate
370.

The premise of the immediate inference by obversion is referred to as

A. Obverse
B. Converse
C. Opposition
D. Obvertend
Answer» D. Obvertend
371.

A deductive argument in which conclusion is inferred from two premises is called

A. Syllogism
B. Representation
C. Analogy
D. Opposition
Answer» A. Syllogism
372.

The term that occurs as the predicate of the conclusion is

A. minor term
B. middle term
C. major term
D. complement
Answer» C. major term
373.

The form of a syllogism may be completely described by stating its mood and________

A. Diagram
B. Figure
C. Structure
D. Complement
Answer» B. Figure
374.

The term that occurs as the subject of the conclusion is called

A. Major term
B. Minor term
C. Middle term
D. Complement
Answer» B. Minor term
375.

In Symbolic logic parentheses, braces , brackets are used as __________ marks

A. Error
B. Disjunction
C. Punctuation
D. Figure
Answer» C. Punctuation
376.

Name the rule of inference ( p . q ) ≡ ( q . p )

A. Distribution
B. Commutation
C. Association
D. Exportation
Answer» B. Commutation
377.

If (∃x ) ~ Mx is true , then (x) Mx is _____________

A. valid
B. true
C. false
D. true or false
Answer» C. false
378.

If (x) ( H x Ͻ Mx ) is true, then (∃x ) ( H x . ~Mx ) is ___________

A. false
B. true or false
C. true
D. valid
Answer» A. false
379.

Bi-conditional statement is also called _____________

A. implication
B. material equivalence
C. material implication
D. logical equivalence
Answer» B. material equivalence
380.

The negation of p v q is symbolised as

A. ~p v q
B. p v ~q
C. ~(p v q)
D. ~ p v ~q
Answer» C. ~(p v q)
381.

Raju and Manu will both not win is symbolised as

A. ~ R v M
B. ~(R.M)
C. R v ~M
D. ~R.~M
Answer» D. ~R.~M
382.

By using symbols, we can ___________the validity of an argument quickly and accurately

A. combine
B. determine
C. deny
D. negation
Answer» B. determine
383.

A statement can be replaced only by a statement logically __________to it .

A. different
B. vague
C. equivalent
D. contradiction
Answer» C. equivalent
384.

By _______________, the left-hand conjunct can be switched over to the right-hand

A. association
B. distribution
C. exportation
D. commutation
Answer» D. commutation
385.

The negation of the conjunction of two statements is logically equivalent to __________ of their negation.

A. disjunction
B. conjunction
C. implication
D. negation
Answer» A. disjunction
386.

Name the rule of replacement (P ≡ q)≡ [(p.q) v (~p.~q)]

A. Exportation
B. Material Equivalence
C. Transposition
D. Association
Answer» B. Material Equivalence
387.

If (∃x ) Mx is true, then (∃x ) ~Mx is ____________

A. true
B. true or false
C. valid
D. false
Answer» B. true or false
388.

Conjunction, Disjunction,Implication and biconditional are called Truth ________ connectives

A. contradictory
B. contrary
C. hidden
D. functional
Answer» D. functional
389.

A general proposition is formed from a propositional function by placing either a universal or an existential __________before it.

A. variable
B. quantifier
C. reference
D. denotation
Answer» B. quantifier

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