Apply unknownprop_b01da77c5200afb1f524e6033a58358c3303b7f4989ae9962b195b5bb398525b with
4a7ef..,
4a7ef..,
02a50.. 4a7ef.. 4a7ef.. = 4a7ef.. leaving 2 subgoals.
The subproof is completed by applying unknownprop_ab73c81bad9b0bc12f7b25a40b099a542950fe0dc2eef2db876de2324d1cbfe7.