1 (J ≡ K) $\lor$ L
2 K ≡ L
3

question 285

Multiple Choice

1. (J ≡ K) $\lor$ L
2. K ≡ L
3. ∼L
-Which of the following propositions is an immediate (one-step) consequence in PL of the given premises?

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

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Definitions:

Fixations

An obsessive interest or feeling that may hinder psychological progress and development.

Egocentrism

A cognitive trait where an individual has difficulty understanding that other people have their own perspectives and viewpoints.

Fixation

A persistent focus of the id’s libido energies on a particular stage of psychosexual development, leading to personality traits based on that stage.

Pessimism

The tendency to see the worst aspect of things or believe that the worst will happen; a lack of hope or confidence in the future.