1. (∀X)(∀y){Pf(x,y) ⊃ [Pf(x,x) • Pf(y,y)]}

question 94

Multiple Choice

1. (∀x) (∀y) {Pf(x,y) ⊃ [Pf(x,x) • Pf(y,y) ]}
2. a=f(d,b)
3. Pa
-Which of the following propositions is derivable from the given premises in FF?

• A) Pf(b,b)
• B) Pf(b,d)
• C) Pf(a,a)
• D) Pf(a,d)
• E) Pf(d,a)

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A characteristic of a good or service whereby it is possible to prevent non-paying customers from having access to it.

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