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Step * of Lemma face-zero-and-one

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∀[X:j⊢]. ∀[z:{X ⊢ _:𝕀}].  (((z=0) ∧ (z=1)) = 0(𝔽) ∈ {X ⊢ _:𝔽})
BY
{ (Auto THEN RWO "face-and-com" 0 THEN Auto) }

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Latex:

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Latex:
No  Annotations
\mforall{}[X:j\mvdash{}].  \mforall{}[z:\{X  \mvdash{}  \_:\mBbbI{}\}].    (((z=0)  \mwedge{}  (z=1))  =  0(\mBbbF{}))


By

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Latex:
(Auto  THEN  RWO  "face-and-com"  0  THEN  Auto)

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