Use only the inference rules MP, MT, DS and HS for this quiz. For each proof, you must include (i.e., write) the premises in that proof.

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Use only the inference rules MP, MT, DS and HS for this quiz. For each proof, you must include (i.e., write) the premises in that proof. Proofs without premises will lead to points being lost. YOU CANNOT USE CONDITIONAL PROOF (CP), INDIRECT PROOF (IP), OR ASSUMED PREMISES (AP). You will lose points if you use any of the inference rules Resolution, Contradiction, Transposition, Idempotence and Identity.  

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---

### Logical Proof Exercises

The following exercises provide practice in constructing logical proofs. For each set of premises, prove the given conclusion.

#### Exercise 1
- **Premises:**
  1. \( C \supset (\sim D \supset \sim X) \)
  2. \( C \)
- **Conclusion:**
  3. \( X \)

**Goal:** Prove \( D \)  
**Note:** /D means to prove D.

---

#### Exercise 2
- **Premises:**
  1. \( A \supset \sim B \)
  2. \( B \)
- **Conclusion:**
  3. \( \sim A \supset (C \lor \sim B) \)

**Goal:** Prove \( C \)

---

#### Exercise 3
- **Premises:**
  1. \( A \supset \sim D \)
- **Conclusion:**
  2. \( \sim D \supset (\sim B \lor \sim \sim A) \)
  3. \( A \)
  4. \( B \)

**Goal:** Prove \( \sim \sim A \)

---

These exercises involve using logical connectives such as implication (\(\supset\)), negation (\(\sim\)), and disjunction (\(\lor\)). Work through each proof step by step to arrive at the desired conclusion.
Transcribed Image Text:Here is the transcription of the text from the image that can be used for an educational website: --- ### Logical Proof Exercises The following exercises provide practice in constructing logical proofs. For each set of premises, prove the given conclusion. #### Exercise 1 - **Premises:** 1. \( C \supset (\sim D \supset \sim X) \) 2. \( C \) - **Conclusion:** 3. \( X \) **Goal:** Prove \( D \) **Note:** /D means to prove D. --- #### Exercise 2 - **Premises:** 1. \( A \supset \sim B \) 2. \( B \) - **Conclusion:** 3. \( \sim A \supset (C \lor \sim B) \) **Goal:** Prove \( C \) --- #### Exercise 3 - **Premises:** 1. \( A \supset \sim D \) - **Conclusion:** 2. \( \sim D \supset (\sim B \lor \sim \sim A) \) 3. \( A \) 4. \( B \) **Goal:** Prove \( \sim \sim A \) --- These exercises involve using logical connectives such as implication (\(\supset\)), negation (\(\sim\)), and disjunction (\(\lor\)). Work through each proof step by step to arrive at the desired conclusion.
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