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Proofgold Proof

pf
Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ιιο be given.
Assume H0: ∀ x3 . x3x1∀ x4 . x4x1x2 x3 x4x2 x4 x3.
Assume H1: 4402e.. x1 x2.
Assume H2: cf2df.. x1 x2.
Let x3 of type ι be given.
Assume H3: x3x1.
Assume H4: x0setminus x1 (Sing x3).
Let x4 of type ι be given.
Assume H5: x4x0.
Let x5 of type ι be given.
Assume H6: x5x0.
Let x6 of type ι be given.
Assume H7: x6x0.
Let x7 of type ι be given.
Assume H8: x7x0.
Let x8 of type ι be given.
Assume H9: x8x0.
Let x9 of type ι be given.
Assume H10: x9x0.
Let x10 of type ι be given.
Assume H11: x10x0.
Let x11 of type ι be given.
Assume H12: x11x0.
Apply setminusE with x1, Sing x3, x4, 0314a.. x2 x4 x5 x6 x7 x8 x9 x10 x11∀ x12 : ο . (∀ x13 . x13x0∀ x14 . x14x0∀ x15 . x15x0∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x0a2064.. x2 x13 x14 x15 x16 x17 x18 x19 x20 x3x12)(∀ x13 . x13x0∀ x14 . x14x0∀ x15 . x15x0∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x04b18d.. x2 x13 x14 x15 x16 x17 x18 x19 x3 x20x12)(∀ x13 . x13x0∀ x14 . x14x0∀ x15 . x15x0∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x0f5da9.. x2 x13 x14 x15 x16 x17 x18 x19 x20 x3x12)x12 leaving 2 subgoals.
Apply H4 with x4.
The subproof is completed by applying H5.
Assume H13: x4x1.
Assume H14: nIn x4 (Sing x3).
Apply setminusE with x1, Sing x3, x5, ...∀ x12 : ο . ...(∀ x13 . ...∀ x14 . ...∀ x15 . ...∀ x16 . ...∀ x17 . ...)(∀ x13 . x13x0∀ x14 . x14x0∀ x15 . x15x0∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x0f5da9.. x2 x13 x14 x15 x16 x17 x18 x19 x20 x3x12)x12 leaving 2 subgoals.
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