For Each of the Following Questions, Determine Whether the Given

question 177

Multiple Choice

For each of the following questions, determine whether the given formula is a wff or not. If it is a wff, indicate its main operator.
-∼[(R • S) ⊃ U] ⊃ {{∼U ⊃ [R ⊃ (S ⊃ T) ]}

• A) It's a wff. The main operator is the first ⊃, reading left to right.
• B) It's a wff. The main operator is the first ∼, reading left to right.
• C) It's a wff. The main operator is the second ⊃, reading left to right.
• D) It's a wff. The main operator is the third ⊃, reading left to right.
• E) Not a wff

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Upward Mobility

The ability or opportunity for an individual or group to improve their social status, often through education or employment.

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Middle-Class

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Social Class

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