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Theorem dig 152

Description: Dig out a ? from ⅋.

**Assertion**
Ref	Expression
dig	⊦ (? (? 𝜑 ⊗ ? 𝜑) ⊸ (? 𝜑 ⊗ ? 𝜑))

**Proof of Theorem dig**
Step	Hyp	Ref	Expression

Colors of variables: wff var nilad

Syntax hints: ? wne 48 ⊸ wli 61 ⊗ wmc 105

WARNING: This theorem has an incomplete proof.

This theorem is referenced by: (None)