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Proofgold Proof
pf
Let x0 of type
ι
be given.
Let x1 of type
ι
be given.
Assume H0:
prim1
x1
x0
.
Apply orIL with
prim1
x1
x0
,
and
(
empty_p
x0
)
(
empty_p
x1
)
.
The subproof is completed by applying H0.
■