Question

A Natural-Deduction proof of $ \{ \neg N,\neg N \to L,D \leftrightarrow \neg N \} \vdash (L \lor A) \land D $.

score 237 · Answer 1 · 2026-04-15 17:56:13

237

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A Natural-Deduction proof of $ \{ \neg N,\neg N \to L,D \leftrightarrow \neg N \} \vdash (L \lor A) \land D $.

Published on 15 Apr 2026 - 17:56

score 154 · Answer 2 · 2026-04-15 13:52:42

154

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Prove that the set of sentences $\{A \land (B \lor C), (\lnot C \lor H) \land (H \rightarrow \lnot H), \lnot B\}$ is inconsistent

Published on 15 Apr 2026 - 13:52

score 11.9k · Answer 3 · 2026-04-15 22:07:51

11.9k

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How is "p implies q" same as "q unless not p"?

Published on 15 Apr 2026 - 22:07

score 42 · Answer 4 · 2026-04-11 17:41:08

42

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Are the following logical statements equal? Solution verification

Published on 11 Apr 2026 - 17:41

score 1.4k · Answer 5 · 2026-04-11 09:53:09

1.4k

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Translation of English statements to logical expression using nested quantifier and predicates.

Published on 11 Apr 2026 - 9:53

score 250 · Answer 6 · 2026-04-09 10:10:45

250

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What does "resolve away" exactly mean in propositional logic?

Published on 09 Apr 2026 - 10:10

score 2.9k · Answer 7 · 2026-04-12 07:03:39

2.9k

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score 332 · Answer 8 · 2026-04-14 13:45:51

332

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1.8k

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1.3k

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How can i prove $p\to (q \vee r) \equiv (p \wedge \sim q) \to r$?

Published on 16 Apr 2026 - 8:05

score 11k · Answer 11 · 2026-04-11 16:31:20

11k

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Simplifying propositional logic

Published on 11 Apr 2026 - 16:31

score 40 · Answer 12 · 2026-04-15 09:13:47

40

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Can I use De Morgan's law in the third step as shown below to solve this problem?

Published on 15 Apr 2026 - 9:13

score 478 · Answer 13 · 2026-04-12 19:29:19

478

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score 39 · Answer 14 · 2026-04-11 23:39:32

39

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score 1.9k · Answer 15 · 2026-04-09 16:53:12

1.9k

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Published on 09 Apr 2026 - 16:53

List Question

A Natural-Deduction proof of $ \{ \neg N,\neg N \to L,D \leftrightarrow \neg N \} \vdash (L \lor A) \land D $.

Prove that the set of sentences $\{A \land (B \lor C), (\lnot C \lor H) \land (H \rightarrow \lnot H), \lnot B\}$ is inconsistent

How is "p implies q" same as "q unless not p"?

Are the following logical statements equal? Solution verification

Translation of English statements to logical expression using nested quantifier and predicates.

What does "resolve away" exactly mean in propositional logic?

Why is the implication "If pigs could fly, I'd be king" a true implication?

Verifying logic without drawing truth tables

Help with natural deduction (Propositional logic)

How can i prove $p\to (q \vee r) \equiv (p \wedge \sim q) \to r$?

Simplifying propositional logic

Can I use De Morgan's law in the third step as shown below to solve this problem?

Can you give a simple CDCL example?

Construct theory with a condition

Creating a proposition from a truth table using only ~ ⋀ and v

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