Let x0 of type ι be given.
Let x1 of type ι be given.
Assume H2: x1 ∈ x0.
Apply ZF_Repl_closed with
x0,
x1,
λ x2 . Inj1 x2 leaving 3 subgoals.
The subproof is completed by applying H1.
The subproof is completed by applying H2.
Let x2 of type ι be given.
Assume H3: x2 ∈ x1.
Apply unknownprop_6171474f197c8259ed73c167f3350e99942e9d4302f7776e81339ae25ce09a62 with
x0,
x2 leaving 3 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
Apply H0 with
x1,
x2 leaving 2 subgoals.
The subproof is completed by applying H2.
The subproof is completed by applying H3.