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Proof step 4 from proof subset-uni (previous step)

H0 ⊆ H1 ⊦ (H1 \ H0) ∪ H0 = H1 ∧ H1 \ H0 ⊥ H0

User applied rule cut formula

And obtained the following new goals

Proof step 5:
H0 ⊆ H1, H1 \ H0 ⊥ H0 ⊦ (H1 \ H0) ∪ H0 = H1 ∧ H1 \ H0 ⊥ H0
Proof step 17:
H0 ⊆ H1 ⊦ H1 \ H0 ⊥ H0, (H1 \ H0) ∪ H0 = H1 ∧ H1 \ H0 ⊥ H0

Rule argument

fma: H1 \ H0 ⊥ H0

Additional information

Used formulas: H1 \ H0 ⊥ H0