Practice coverage
Basic LogicTruth, validity, argument and argument-form.
Traditional LogicCategorical propositions, syllogism, square of opposition.
Symbolic LogicTruth-functions, truth tables, quantification.
FallaciesFormal and informal fallacies; testing arguments.
Free sample MCQs with explanations
1. Validity is primarily a property of—
- Arguments
- Single terms
- Definitions only
- Emotions
Answer & explanation
A. Arguments. An argument is valid when the conclusion follows from the premises in the relevant logical sense.
2. A categorical syllogism contains how many categorical propositions?
- Two
- Three
- Four
- Five
Answer & explanation
B. Three. It has two premises and one conclusion.
3. A truth table is commonly used to test—
- Truth-functional arguments
- Only historical claims
- Aesthetic judgments
- Definitions of terms only
Answer & explanation
A. Truth-functional arguments. Truth tables evaluate combinations of truth-values in propositional logic.
4. An error in reasoning is called a—
- Fallacy
- Tautology
- Definition
- Denotation
Answer & explanation
A. Fallacy. Fallacies are defective patterns or moves in reasoning.
5. The square of opposition concerns relations among—
- Categorical propositions
- Only questions
- Proper names
- Commands
Answer & explanation
A. Categorical propositions. It represents traditional relations such as contradiction, contrariety and subalternation.
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