Top 80+ Solved Essentials of the Symbolic Logic MCQ Questions Answer
Q. Refutation by logical analogy is based on the fact that any argument whosespecific form is an invalid argument form is ………………………..
a. sound
b. a contradiction
c. an invalid argument.
d. a valid argument
Q. ………………………… is any sequence of symbols containing statement variables butno statements, such that when statements are substituted for the statement\ variables-the same statement being substituted for the same statement variable throughout- the result is a statement
a. an argument form
b. specific form of argument
c. a statement form
d. argument
Q. ’statement form from which the statement results by substituting a differentsimple statement for each different statement variable’ is called ……………………..
a. the specific form of a given argument
b. tautology
c. contradiction
d. the specific form of a given statement
Q. A statement form that has only true substitution instances is called ……………………
a. a “ tautologous statement form “ or a “ tautology”
b. a self-contradictory statement form or contradiction
c. a contingent statement form
d. specific statement form
Q. Statement forms that have both true and false statements among theirsubstitution instances are called ……………………………………………..
a. tautologous statement forms
b. contingent statement forms
c. self-contradictory statement forms
d. specific statement forms
Q. Two statements are ………………… when their material equivalence is a tautology
a. self-contradictory
b. contingent
c. logically equivalent
d. materially implying
Q. …………………. statements have the same meaning and may be substituted for oneanother
a. materially equivalent
b. logically equivalent
c. tautologous
d. self-contradictory
Q. An argument form is valid if and only if it’s expression in the form of a conditionalstatement is ……………
a. a contradiction
b. a biconditional
c. a tautology
d. material implication
Q. ………………………… is defined as any argument that is a substitution instance of anelementary valid argument form
a. an elementary valid argument
b. formal proof
c. tautology
d. contradiction
Q. ……………………………………. are defined as expressions which contain individualvariables and become propositions when their individual variables are replaced by individual constants
a. truth-functions
b. propositional functions
c. quantifiers
d. statement variables
Q. The process of obtaining a proposition from a propositional function bysubstituting a constant for a variable is called …………………………………
a. quantification
b. deduction
c. instantiation
d. generalization
Q. General propositions can be regarded as resulting from propositional functionsby a process called
a. instantiation
b. substitution
c. deduction
d. quantification
Q. The phrase ‘Given any x’ is called …………………………………….
a. a propositional function
b. a universal quantifier
c. truth-function
d. an existential quantifier
Q. As per modern interpretation of traditional subject-predicate propositions,A and O propositions are …………………..
a. contraries
b. sub-contraries
c. sub alterns
d. contradictories
Q. As per modern interpretation of traditional subject-predicate propositions,E and I propositions are ………………………………
a. contradictories
b. sub alterns
c. sub-contraries
d. contraries