Let x0 of type ι be given.
Let x1 of type ι → ι → ο be given.
Let x2 of type ι → ο be given.
Let x3 of type ι be given.
Let x4 of type ι be given.
Apply unknownprop_6ef01a13f7c36ada7f185a4c58513cabf0184466a91ecc2ed500a4a9e77c4a8d with
363b9.. x0 x1 x2 x3 x4,
x0,
x1,
x2,
x3,
x4.
Let x5 of type ι → ι → ο be given.
The subproof is completed by applying H0.