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Proofgold Proof
pf
Let x0 of type
ι
be given.
Let x1 of type
ο
be given.
Assume H0:
∀ x2 .
(
∀ x3 .
iff
(
prim1
x3
x2
)
(
prim1
x3
x0
)
)
⟶
x1
.
Apply H0 with
x0
.
Let x2 of type
ι
be given.
The subproof is completed by applying iff_refl with
prim1
x2
x0
.
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