Final answer:
The correct conclusion that follows in a single step from the given premises is J • ∼N.
Step-by-step explanation:
The argument consists of three premises:
- (J • ∼N) ∨ T
- ∼(J • ∼N)
- ∼T
We can use these premises to draw the conclusion by applying the disjunctive syllogism.
- J • ∼N
Therefore, the correct answer is option a. J • ∼N which follows in a single step from the given premises.