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Proofgold Proof

pf
Let x0 of type ιο be given.
Let x1 of type ιιι be given.
Assume H0: ∀ x2 x3 . x0 x2x0 x3x0 (x1 x2 x3).
Assume H1: ∀ x2 x3 x4 . x0 x2x0 x3x0 x4x1 x2 (x1 x3 x4) = x1 (x1 x2 x3) x4.
Assume H2: ∀ x2 x3 . x0 x2x0 x3x1 x2 x3 = x1 x3 x2.
Let x2 of type ι be given.
Let x3 of type ι be given.
Let x4 of type ι be given.
Let x5 of type ι be given.
Let x6 of type ι be given.
Assume H3: x0 x2.
Assume H4: x0 x3.
Assume H5: x0 x4.
Assume H6: x0 x5.
Assume H7: x0 x6.
Claim L8: ∀ x7 x8 x9 . x0 x7x0 x8x0 x9x1 x7 (x1 x8 x9) = x1 x8 (x1 x7 x9)
Let x7 of type ι be given.
Let x8 of type ι be given.
Let x9 of type ι be given.
Assume H8: x0 x7.
Assume H9: x0 x8.
Assume H10: x0 x9.
Apply H1 with x8, x7, x9, λ x10 x11 . x1 x7 (x1 x8 x9) = x11 leaving 4 subgoals.
The subproof is completed by applying H9.
The subproof is completed by applying H8.
The subproof is completed by applying H10.
Apply H2 with x7, x8, λ x10 x11 . x1 x7 (x1 x8 x9) = x1 x10 x9 leaving 3 subgoals.
The subproof is completed by applying H8.
The subproof is completed by applying H9.
Apply H1 with x7, x8, x9 leaving 3 subgoals.
The subproof is completed by applying H8.
The subproof is completed by applying H9.
The subproof is completed by applying H10.
Apply unknownprop_633373dd777017341110b0cfc94562f2305877a1d3f40ac7e59edcba686b9110 with x0, x1, x2, x3, x4, x5, x6 leaving 8 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying L8.
The subproof is completed by applying H2.
The subproof is completed by applying H3.
The subproof is completed by applying H4.
The subproof is completed by applying H5.
The subproof is completed by applying H6.
The subproof is completed by applying H7.