I Know Something If, and Only If, I Have Some

question 20

Multiple Choice

I know something if, and only if, I have some causal contact with the physical world. If I know something, then there is no demon deceiver. I know something. So, I know something just in case both I have causal contact with the physical world and there is no demon deceiver.
-Which of the following is the best translation into PL of this argument?

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

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Definitions:

Autistic Disorder

A neurodevelopmental disorder characterized by challenges in social interaction, communication, and restricted or repetitive behaviors and interests.

Hallucinations

Hallucinations are perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, often manifesting in visual or auditory forms.

Adverse Events

unintended and harmful outcomes resulting from medical interventions, medications, or procedures.

Schizophrenic Experiences

Episodes or symptoms characterized by distorted perceptions of reality, often manifesting in hallucinations, delusions, and disorganized thinking, associated with schizophrenia.