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Proofgold Proof
pf
Let x0 of type
(
ι
→
ι
→
ι
) →
(
ι
→
ι
→
ι
) →
ο
be given.
Assume H0:
x0
(
permargs_i_1_0
ChurchBoolFal
)
ChurchBoolTru
.
The subproof is completed by applying H0.
■