Question

What is a good way to see logical equivalence statements fast

score 911 · Answer 1 · 2026-04-12 11:47:40

911

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What is a good way to see logical equivalence statements fast

Published on 12 Apr 2026 - 11:47

score 118 · Answer 2 · 2026-04-14 06:56:35

118

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Contraposition and contradiction

Published on 14 Apr 2026 - 6:56

score 1k · Answer 3 · 2026-04-14 00:24:51

1k

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Associative law confusion

Published on 14 Apr 2026 - 0:24

score 86 · Answer 4 · 2026-04-12 04:24:04

86

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How to most quickly check whether a given sentence is logically equivalent to $p↔q$?

Published on 12 Apr 2026 - 4:24

score 35 · Answer 5 · 2026-04-11 01:10:07

35

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If a well-formed formula is equal to another well-formed formula, does that mean their variables are equal too?

Published on 11 Apr 2026 - 1:10

score 271 · Answer 6 · 2026-04-15 22:55:34

271

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Let $\Sigma$ be a maximal consistent set of formulas. Prove that |mod($\Sigma$)|= 1

Published on 15 Apr 2026 - 22:55

score 23 · Answer 7 · 2026-04-11 09:06:13

23

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What is $\beta(p_i)$ where $p_i$ is a propositional variable?

Published on 11 Apr 2026 - 9:06

score 421 · Answer 8 · 2026-05-10 17:17:46

421

Views

Natural deduction proof for $(a\to(b\to c))\to((a\to b)\to(a\to c))$

Published on 10 May 2026 - 17:17

score 65 · Answer 9 · 2026-04-08 16:22:30

65

Views

Proof in propositional logic involving deduction rule

Published on 08 Apr 2026 - 16:22

score 212 · Answer 10 · 2026-04-10 12:02:54

212

Views

How can I prove false is not a theorem?

Published on 10 Apr 2026 - 12:02

score 120 · Answer 11 · 2026-04-15 21:40:09

120

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Show that $\Sigma\vDash p_1\vee p_2\vee...\vee p_n$

Published on 15 Apr 2026 - 21:40

score 96 · Answer 12 · 2026-04-15 07:43:48

96

Views

prove if and only if logic equivalent to ($P\lor Q) \rightarrow (P\land Q $)(using the laws without truth table)

Published on 15 Apr 2026 - 7:43

score 133 · Answer 13 · 2026-04-08 05:30:39

133

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Basic Question about Universal Quantifiers in Predicate Logic

Published on 08 Apr 2026 - 5:30

score 486 · Answer 14 · 2026-05-11 01:48:27

486

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Is it possible to prove that we found the shortest proof?

Published on 11 May 2026 - 1:48

score 232 · Answer 15 · 2026-04-14 15:57:03

232

Views

negation of an advance conditional statement

Published on 14 Apr 2026 - 15:57

List Question

What is a good way to see logical equivalence statements fast

Contraposition and contradiction

Associative law confusion

How to most quickly check whether a given sentence is logically equivalent to $p↔q$?

If a well-formed formula is equal to another well-formed formula, does that mean their variables are equal too?

Let $\Sigma$ be a maximal consistent set of formulas. Prove that |mod($\Sigma$)|= 1

What is $\beta(p_i)$ where $p_i$ is a propositional variable?

Natural deduction proof for $(a\to(b\to c))\to((a\to b)\to(a\to c))$

Proof in propositional logic involving deduction rule

How can I prove false is not a theorem?

Show that $\Sigma\vDash p_1\vee p_2\vee...\vee p_n$

prove if and only if logic equivalent to ($P\lor Q) \rightarrow (P\land Q $)(using the laws without truth table)

Basic Question about Universal Quantifiers in Predicate Logic

Is it possible to prove that we found the shortest proof?

negation of an advance conditional statement

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