Consider this proof (indentations have been removed) for a F-L Axiom system:1.А — ВP2.AP[for A → B]3.А — (В — А)Ахiom 14.B → A2, 3, MP2 —4, СР6.(А — В) — (В— А) 1,5, СР5.А — (В — А)-Which is most accurate?Correct proofIncorrect at line 2Incorrect at line 5Incorrect at line 6 Consider the Hilbert-Ackerman (H-A) Axioms:1.A VA — А2.А — A V В3.A VВ — ВVA→ BVA4.(A → B) → (C V A → C v B)→ (C V A → C V B)Proof rules: MP and A → B = ¬A v BIs the following proof of the given wff correct?-A (А — В)Proof:1.¬A → (¬A v B)2.-А — (А — В)QEDTrueFalseO No ideaWhere am I?

Answered: Image /qna-images/answer/9b231191-3421-4884-a5e5-9b16c47a6887.jpg

Answered: 1is proor oved) systen 1.А — В P 2.А…

1is proor oved) systen 1.А — В P 2.А P[for A → B] 3.А — (В — А) Aхiom 1 4.В → A 2, 3, MP 5.А — (В — А) 2 — 4, СР 6.(А — В) — (В — A) 1,5, СР

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter2: Parallel Lines

Section2.CT: Test

Problem 3CT: To prove a theorem of the form "If P, then Q" by the indirect method, the first line of the proof...

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Question

Consider this proof (indentations have been removed) for a F-L Axiom system:
1.А — В
P
2.A
P[for A → B]
3.А — (В — А)
Ахiom 1
4.B → A
2, 3, MP
2 —4, СР
6.(А — В) — (В— А) 1,5, СР
5.А — (В — А)
-
Which is most accurate?
Correct proof
Incorrect at line 2
Incorrect at line 5
Incorrect at line 6

Consider the Hilbert-Ackerman (H-A) Axioms:
1.A VA — А
2.А — A V В
3.A VВ — ВVA
→ BVA
4.(A → B) → (C V A → C v B)
→ (C V A → C V B)
Proof rules: MP and A → B = ¬A v B
Is the following proof of the given wff correct?
-A (А — В)
Proof:
1.¬A → (¬A v B)
2.-А — (А — В)
QED
True
False
O No idea
Where am I?

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