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Proofgold Proof
pf
Let x0 of type
ι
be given.
Assume H0:
not
(
SNoLe
0
x0
)
.
Apply If_i_0 with
SNoLe
0
x0
,
x0
,
minus_SNo
x0
.
The subproof is completed by applying H0.
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