Solved

Given the Argument: R ∨ I / ∼ S ∨

Question 68

Multiple Choice

Given the argument: R ∨ I / ∼ S ∨ (R ⊃ I) // S ⊃ I
This argument is:

A) Valid.
B) Invalid; fails in 4^th line.
C) Invalid; fails in 2^nd line.
D) Invalid; fails in 5^th line.
E) Invalid; fails in 3^rd line.

Related Questions

Q63: Given the pair of statements: M •

Q64: ∼S <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6612/.jpg" alt="∼S A)

Q65: Given the statements: (E ∨ P) ⊃

Q66: P ∨ ∼D <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6612/.jpg" alt="P ∨

Q67: ∼N ⊃ H <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6612/.jpg" alt="∼N ⊃

Q69: Corona is drinkable if Pabst is clean

Q70: ∼G ⊃ E <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6612/.jpg" alt="∼G ⊃

Q71: Carnival advertises its parties if and only

Q72: In Proposition 1I, the main operator is

Q73: Given the pair of statements: (H •