Top 80+ Solved Essentials of the Symbolic Logic MCQ Questions Answer
Q. A conjunction is true if and only if ……………………………………….
a. at least one conjunct is true
b. both of it’s conjuncts are true
c. both conjuncts are false
d. none of the above
Q. Inclusive or weak disjunction is false only in case ……………………………………………….
a. both of it’s disjuncts are false
b. at least one disjunct is false
c. both disjuncts are true
d. none of the above
Q. The dot “ . ”symbol is……………………………………..
a. a truth-functional operator
b. a statement variable
c. propositional function
d. a truth-functional connective
Q. Gopal is either intelligent or hard working’ is an example for …………………………
a. bi-conditional
b. implication
c. inclusive or weak disjunction
d. exclusive or strong disjunction
Q. ‘Today is Thursday or Saturday’ is an example for………………………………..
a. implication
b. exclusive disjunction
c. inclusive disjunction
d. bi conditional
Q. ’If you study well, then you will pass the examination’ is an example for ……………
a. implication
b. bi-conditional
c. disjunction
d. conjunction
Q. A conditional statement asserts that in any case in which it’s antecedent is true,it’s consequent is ……………………………
a. not true
b. true or false
c. false
d. true also
Q. No real connection between antecedent and consequent is suggested by …………
a. decisional implication
b. material implication
c. causal implication
d. definitional implication
Q. ’ The conjunction of p with the disjunction of q with r’, is symbolized as …….
a. ( p vq ) . r
b. ( p . q ) v r
c. p . ( q v r )
d. p v ( q . r )
Q. ‘The disjunction whose first disjunct is the conjunction of p and q and whosesecond disjunct is r ‘ is symbolized as ………………………..
a. p v ( q . r )
b. ( p vq ) . r
c. p . ( q v r )
d. ( p . q ) v r
Q. An argument can be proved invalid by constructing another argument of thesame form with …………………….
a. false premises and false conclusion
b. true premises and false conclusion
c. true premises and true conclusion
d. false premises and true conclusion
Q. …………………………… can be defined as an array of symbols containing statementvariables but no statements, such that when statements are substituted for statement variables- the same statement being substituted for the same statement variable throughout – the result is an argument
a. specific statement form
b. a statement form
c. an argument form
d. an argument
Q. Any argument that results from the substitution of statements for statementvariables in an argument form is called ………………………………
a. invalid argument
b. valid argument
c. the specific form
d. a “ substitution instance” of that argument form
Q. In case an argument is produced by substituting a different simple statement foreach different statement variable in an argument form, that argument form is called ……………………
a. the “specific form” of that argument
b. a “ substitution instance” of that argument form
c. valid argument
d. invalid argument
Q. If the specific form of a given argument has any substitution instance whosepremises are true and whose conclusion is false, then the given argument is.
a. valid
b. invalid
c. valid or invalid
d. sound