1 J ⊃ (K ⊃ M)
2 $\lor$ ∼M
3 J

question 253

Multiple Choice

1. J ⊃ (K ⊃ M)
2. L $\lor$ ∼M
3. J $\lor$ (K • ∼L)
-Which of the following propositions is derivable from the given premises using any of the twenty-five rules of PL and either the direct or conditional methods of proof?

• A) J ≡ K
• B) J ≡ (K ⊃ L)
• C) J ≡ L
• D) J ≡ M
• E) J ≡ (M ⊃ L)

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Hydraulic Gradient

The slope or gradient of the water table.

Water Table

The upper level of an underground surface in which the soil or rocks are permanently saturated with water, marking the boundary between the unsaturated zone above and the saturated zone below.

Septic Tank

A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater flows for basic treatment.