Solved

1. (∀X)(∀y)(Bxy ≡ Dyx)

Question 58

Multiple Choice

1. (∀x) (∀y) (Bxy ≡ Dyx)
2. (∃x) Bxf(x)
-Which of the following propositions is an immediate (one-step) consequence in FF of the given premises?

A) (∃x) Baa
B) (∃x) Bf(x) f(x)
C) Baa
D) Bf(x) f(x)
E) Baf(a)

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