Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι → ι be given.
Let x3 of type ι → ο be given.
Let x4 of type ι be given.
Let x5 of type ι be given.
Assume H0:
x0 = 726e4.. x1 x2 x3 x4 x5.
Apply H0 with
λ x6 x7 . x4 = f482f.. x7 (4ae4a.. (4ae4a.. (4ae4a.. 4a7ef..))).
Let x6 of type ι → ι → ο be given.
The subproof is completed by applying unknownprop_abc631d2ee922f3c5533a4d3e52c7b3284ce5617d6e20f0e1d4266850fbf4b4f with
x1,
0fc90.. x1 x2,
1216a.. x1 x3,
x4,
x5,
λ x7 x8 . x6 x8 x7.