1 X ⊃ (∼Y $\lor$ Z)
2 ∼X ⊃ (Y

question 290

Multiple Choice

1. X ⊃ (∼Y $\lor$ Z)
2. ∼X ⊃ (Y $\lor$ Z)
3. ∼Z
-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) X ≡ Z
• B) X ≡ ∼Z
• C) Z ≡ ∼X
• D) X ≡ Y
• E) X ≡ ∼Y

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Definitions:

Psychosexual Stages

Freud's theory of five developmental stages from infancy to adulthood, where pleasure shifts from one body part to another.

Phallic Stage

A phase in Freudian psychosexual development occurring in early childhood, where the libido's focus is on the genital area.

Defense Mechanisms

Psychological strategies used by individuals to cope with reality and maintain self-image.