Let x0 of type ι be given.
Apply unknownprop_9cdeca2a60d0177233427129e29ed2aec16e770191654a999da75532b00612a1 with
x0,
λ x1 x2 . x2 = x0 leaving 2 subgoals.
Apply unknownprop_30912f2cca40a10142321c491284d8399f9fb6058ea49ef0a3ac5fa1be4efa52 with
x0.
The subproof is completed by applying H0.
Apply unknownprop_b0d5c07b58c35dec2d98b8c0aef5865d54317627a7a2b363b61462669e811c57 with
x0.
The subproof is completed by applying H0.