Explanations are good just in case understanding is increased. Understanding is not increased if, and only if, explanations are empirical deductions. So, explanations are good if, and only if, they are not logical deductions.
-Consider assuming '∼D' for conditional proof. Which of the following propositions is an immediate (one-step) consequence in PL of the given premises with that further assumption for conditional proof?
A) ∼U
B) ∼∼U
C) ∼D ≡ U
D) D ≡ ∼U
E) D ≡ U

Question

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The Answer of Explanations are good just in case understanding is increased. Understanding is not increased if, and only if, explanations are empirical deductions. So, explanations are good if, and only if, they are not logical deductions.
-Consider assuming '∼D' for conditional proof. Which of the following propositions is an immediate (one-step) consequence in PL of the given premises with that further assumption for conditional proof?
A) ∼U
B) ∼∼U
C) ∼D ≡ U
D) D ≡ ∼U
E) D ≡ U

Explanations Are Good Just in Case Understanding Is Increased