Question

How to show $\neg(P \rightarrow Q) \rightarrow (P ∧ \neg Q)$ in Fitch?

score 419 · Answer 1 · 2019-11-24 01:38:09

How to show $\neg(P \rightarrow Q) \rightarrow (P ∧ \neg Q)$ in Fitch?

Published on 24 Nov 2019 - 1:38

score 112 · Answer 2 · 2019-11-25 15:31:27

Prove $\forall x\ (P(x)\Rightarrow Q(x)), \ \forall x\ (Q(x)\Rightarrow W(x)), \ \neg\exists x\ W(x)⊢\neg \exists x\ P(x)$ with Fitch

score 53 · Answer 3 · 2019-11-26 02:25:00

53

Views

Derivation of 'at most' equivalence in natural deduction

Published on 26 Nov 2019 - 2:25

score 12 · Answer 4 · 2019-11-26 16:48:32

12

Views

Finding original sample size from result percentage (sales from returned units)

Published on 26 Nov 2019 - 16:48

score 394 · Answer 5 · 2019-11-28 17:26:24

394

Views

Natural deduction derivation of $\forall x (B(x) \to C(x)) \vdash \neg \exists y (B(y) \land \neg C(y))$

Published on 28 Nov 2019 - 17:26

score 1.3k · Answer 6 · 2019-11-28 21:23:13

1.3k

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How formally to prove commutativity of disjunctions with natural deduction?

Published on 28 Nov 2019 - 21:23

score 84 · Answer 7 · 2019-12-02 00:11:23

84

Views

Predicate Logic Natural Deduction

Published on 02 Dec 2019 - 0:11

score 57 · Answer 8 · 2019-12-02 13:18:33

57

Views

Help for a Borkowski/Slupecki-Style Natural Deduction Proof

Published on 02 Dec 2019 - 13:18

score 88 · Answer 9 · 2019-12-05 15:39:19

88

Views

Proofs for a bi-conditional and conditional premise

Published on 05 Dec 2019 - 15:39

score 586 · Answer 10 · 2019-12-07 15:50:22

586

Views

Solving a Smullyan style knight and knave problem using natural deduction. How to shorten this proof?

Published on 07 Dec 2019 - 15:50

score 281 · Answer 11 · 2019-12-15 20:16:23

281

Views

Show: $\lnot F \rightarrow G, F \rightarrow H \vdash G ∨ H$

Published on 15 Dec 2019 - 20:16

score 99 · Answer 12 · 2019-12-19 11:59:48

99

Views

Natural deduction for equivalence

Published on 19 Dec 2019 - 11:59

score 178 · Answer 13 · 2019-12-19 13:49:36

178

Views

Prove the theorem by using natural deduction in propositional logic. Is it right to use De Morgan laws?

Published on 19 Dec 2019 - 13:49

score 52 · Answer 14 · 2019-12-19 16:46:48

52

Views

get the proof of theorem using natural deduction

Published on 19 Dec 2019 - 16:46

score 415 · Answer 15 · 2019-12-20 00:53:12

415

Views

Everyone loves all lovers, Romeo loves Juliet $\vdash$ I love you (Natural deduction proof)

Published on 20 Dec 2019 - 0:53

List Question

How to show $\neg(P \rightarrow Q) \rightarrow (P ∧ \neg Q)$ in Fitch?

Prove $\forall x\ (P(x)\Rightarrow Q(x)), \ \forall x\ (Q(x)\Rightarrow W(x)), \ \neg\exists x\ W(x)⊢\neg \exists x\ P(x)$ with Fitch

Derivation of 'at most' equivalence in natural deduction

Finding original sample size from result percentage (sales from returned units)

Natural deduction derivation of $\forall x (B(x) \to C(x)) \vdash \neg \exists y (B(y) \land \neg C(y))$

How formally to prove commutativity of disjunctions with natural deduction?

Predicate Logic Natural Deduction

Help for a Borkowski/Slupecki-Style Natural Deduction Proof

Proofs for a bi-conditional and conditional premise

Solving a Smullyan style knight and knave problem using natural deduction. How to shorten this proof?

Show: $\lnot F \rightarrow G, F \rightarrow H \vdash G ∨ H$

Natural deduction for equivalence

Prove the theorem by using natural deduction in propositional logic. Is it right to use De Morgan laws?

get the proof of theorem using natural deduction

Everyone loves all lovers, Romeo loves Juliet $\vdash$ I love you (Natural deduction proof)

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