a) P→q^r q→ r d-:: b) bvd- ¬(pvr)→s r-p :.S
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
Use the logical equivalence laws and/or logical reasoning rules to prove that each
of the following arguments is valid.
![**Logical Proof Problems**
The image presents two logical proof problems labeled (a) and (b). Each problem involves multiple premises leading to a conclusion. Here is a detailed transcription and explanation:
### a) Logical Proof Problem
**Premises:**
1. \( p \rightarrow (q \land r) \)
2. \( \neg q \rightarrow \neg r \)
3. \( \neg r \)
**Conclusion:**
\[ \therefore \neg p \]
#### Explanation:
- \( p \rightarrow (q \land r) \): If \( p \) is true, then both \( q \) and \( r \) are true.
- \( \neg q \rightarrow \neg r \): If \( q \) is false, then \( r \) is false.
- \( \neg r \): \( r \) is false.
The goal is to derive \( \neg p \) (that \( p \) is false) given the above premises.
### b) Logical Proof Problem
**Premises:**
1. \( \neg p \land q \)
2. \( \neg (p \lor r) \rightarrow s \)
3. \( r \rightarrow p \)
**Conclusion:**
\[ \therefore s \]
#### Explanation:
- \( \neg p \land q \): \( p \) is false and \( q \) is true.
- \( \neg (p \lor r) \rightarrow s \): If neither \( p \) nor \( r \) is true, then \( s \) is true.
- \( r \rightarrow p \): If \( r \) is true, then \( p \) is true.
The goal is to derive \( s \) (that \( s \) is true) given the above premises.
These problems involve the use of logical deductions to reach the conclusion from the given premises using rules of inference.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb493ecdd-cbdc-400d-a05a-de2010eb2d52%2F7cb8b819-5b0e-4800-a67d-3e570cca5f11%2Frzzwqng_processed.png&w=3840&q=75)
Transcribed Image Text:**Logical Proof Problems**
The image presents two logical proof problems labeled (a) and (b). Each problem involves multiple premises leading to a conclusion. Here is a detailed transcription and explanation:
### a) Logical Proof Problem
**Premises:**
1. \( p \rightarrow (q \land r) \)
2. \( \neg q \rightarrow \neg r \)
3. \( \neg r \)
**Conclusion:**
\[ \therefore \neg p \]
#### Explanation:
- \( p \rightarrow (q \land r) \): If \( p \) is true, then both \( q \) and \( r \) are true.
- \( \neg q \rightarrow \neg r \): If \( q \) is false, then \( r \) is false.
- \( \neg r \): \( r \) is false.
The goal is to derive \( \neg p \) (that \( p \) is false) given the above premises.
### b) Logical Proof Problem
**Premises:**
1. \( \neg p \land q \)
2. \( \neg (p \lor r) \rightarrow s \)
3. \( r \rightarrow p \)
**Conclusion:**
\[ \therefore s \]
#### Explanation:
- \( \neg p \land q \): \( p \) is false and \( q \) is true.
- \( \neg (p \lor r) \rightarrow s \): If neither \( p \) nor \( r \) is true, then \( s \) is true.
- \( r \rightarrow p \): If \( r \) is true, then \( p \) is true.
The goal is to derive \( s \) (that \( s \) is true) given the above premises.
These problems involve the use of logical deductions to reach the conclusion from the given premises using rules of inference.
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