Accredited Test Bank Solution For
Introduction to Logic, 15th Edition Copi
[All Lessons Included]
Complete Chapter Solution Manual
are Included (Ch.1 to Ch.14)
• Rapid Download
• Quick Turnaround
• Complete Chapters Provided
, Table of Contents are Given Below
"Introduction to Logic" (15th Edition) by Irving M. Copi, Carl Cohen, and Victor Rodych is structured into three
main parts, each encompassing several chapters that cover fundamental aspects of logic. The chapters are
organized as follows:
Part I: Logic and Language
1. Basic Logical Concepts
2. Analyzing Arguments
3. Language and Definitions
4. Fallacies
Part II: Deduction
5. Categorical Propositions
6. Categorical Syllogisms
7. Syllogisms in Ordinary Language
8. Propositional Logic I: Truth-Functional Statements and Arguments
9. Propositional Logic II: Methods of Deduction
10. Predicate Logic: Quantification Theory
Part III: Induction
11. Analogical Reasoning
12. Causal Reasoning
13. Science and Hypothesis
14. Probability
This comprehensive structure provides readers with a solid foundation in both formal and informal logic,
emphasizing critical thinking and analytical skills.
PAGE 1
,Part I: Logic and Language
Section 1: Basic Logical Concepts
Question 1:
Which of the following best defines a proposition?
A) A question that seeks information.
B) A statement that is either true or false.
C) A command or request.
D) An exclamation expressing emotion.
Answer: B) A statement that is either true or false.
Explanation: A proposition is a declarative sentence that is capable of being either true or false, but not both.
Question 2:
What is the negation of the proposition "All birds can fly"?
A) Some birds cannot fly.
B) No birds can fly.
C) All birds cannot fly.
D) Some birds can fly.
Answer: A) Some birds cannot fly.
Explanation: Negation changes the original statement to express that not all birds can fly, which is correctly
stated as "Some birds cannot fly."
Question 3:
In logic, the term tautology refers to:
A) A proposition that is always false.
B) A proposition that is sometimes true and sometimes false.
C) A proposition that is always true.
D) A proposition that contradicts itself.
Answer: C) A proposition that is always true.
PAGE 2
, Explanation: A tautology is a formula or assertion that is true in every possible interpretation, such as "It will
either rain tomorrow or it will not rain tomorrow."
Question 4:
Which logical connective represents "and"?
A) ∨
B) ∧
C) ¬
D) →
Answer: B) ∧
Explanation: The symbol "∧" stands for the logical connective "and," which combines two propositions to form a
new proposition that is true only if both original propositions are true.
Question 5:
What is the contrapositive of the implication "If it rains, then the ground is wet"?
A) If the ground is not wet, then it does not rain.
B) If the ground is wet, then it rains.
C) If it does not rain, then the ground is not wet.
D) If it rains, then the ground is not wet.
Answer: A) If the ground is not wet, then it does not rain.
Explanation: The contrapositive of "If P, then Q" is "If not Q, then not P," which in this case is "If the ground is
not wet, then it does not rain."
Question 6:
Which of the following is an example of a biconditional statement?
A) If it is raining, then the ground is wet.
B) It is raining and the ground is wet.
C) It is raining or the ground is wet.
D) It is raining if and only if the ground is wet.
PAGE 3
Introduction to Logic, 15th Edition Copi
[All Lessons Included]
Complete Chapter Solution Manual
are Included (Ch.1 to Ch.14)
• Rapid Download
• Quick Turnaround
• Complete Chapters Provided
, Table of Contents are Given Below
"Introduction to Logic" (15th Edition) by Irving M. Copi, Carl Cohen, and Victor Rodych is structured into three
main parts, each encompassing several chapters that cover fundamental aspects of logic. The chapters are
organized as follows:
Part I: Logic and Language
1. Basic Logical Concepts
2. Analyzing Arguments
3. Language and Definitions
4. Fallacies
Part II: Deduction
5. Categorical Propositions
6. Categorical Syllogisms
7. Syllogisms in Ordinary Language
8. Propositional Logic I: Truth-Functional Statements and Arguments
9. Propositional Logic II: Methods of Deduction
10. Predicate Logic: Quantification Theory
Part III: Induction
11. Analogical Reasoning
12. Causal Reasoning
13. Science and Hypothesis
14. Probability
This comprehensive structure provides readers with a solid foundation in both formal and informal logic,
emphasizing critical thinking and analytical skills.
PAGE 1
,Part I: Logic and Language
Section 1: Basic Logical Concepts
Question 1:
Which of the following best defines a proposition?
A) A question that seeks information.
B) A statement that is either true or false.
C) A command or request.
D) An exclamation expressing emotion.
Answer: B) A statement that is either true or false.
Explanation: A proposition is a declarative sentence that is capable of being either true or false, but not both.
Question 2:
What is the negation of the proposition "All birds can fly"?
A) Some birds cannot fly.
B) No birds can fly.
C) All birds cannot fly.
D) Some birds can fly.
Answer: A) Some birds cannot fly.
Explanation: Negation changes the original statement to express that not all birds can fly, which is correctly
stated as "Some birds cannot fly."
Question 3:
In logic, the term tautology refers to:
A) A proposition that is always false.
B) A proposition that is sometimes true and sometimes false.
C) A proposition that is always true.
D) A proposition that contradicts itself.
Answer: C) A proposition that is always true.
PAGE 2
, Explanation: A tautology is a formula or assertion that is true in every possible interpretation, such as "It will
either rain tomorrow or it will not rain tomorrow."
Question 4:
Which logical connective represents "and"?
A) ∨
B) ∧
C) ¬
D) →
Answer: B) ∧
Explanation: The symbol "∧" stands for the logical connective "and," which combines two propositions to form a
new proposition that is true only if both original propositions are true.
Question 5:
What is the contrapositive of the implication "If it rains, then the ground is wet"?
A) If the ground is not wet, then it does not rain.
B) If the ground is wet, then it rains.
C) If it does not rain, then the ground is not wet.
D) If it rains, then the ground is not wet.
Answer: A) If the ground is not wet, then it does not rain.
Explanation: The contrapositive of "If P, then Q" is "If not Q, then not P," which in this case is "If the ground is
not wet, then it does not rain."
Question 6:
Which of the following is an example of a biconditional statement?
A) If it is raining, then the ground is wet.
B) It is raining and the ground is wet.
C) It is raining or the ground is wet.
D) It is raining if and only if the ground is wet.
PAGE 3
