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Step * 2 1 1 of Lemma assert_of_band2

.....wf..... 
1. p : 𝔹
2. ↑p
3. q : ⋂:True. 𝔹
⊢ q ∈ 𝔹
BY
{ (With ⌜⋅⌝ (D (-1))⋅ THEN Auto) }

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Latex:

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Latex:
.....wf..... 
1.  p  :  \mBbbB{}
2.  \muparrow{}p
3.  q  :  \mcap{}:True.  \mBbbB{}
\mvdash{}  q  \mmember{}  \mBbbB{}


By

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Latex:
(With  \mkleeneopen{}\mcdot{}\mkleeneclose{}  (D  (-1))\mcdot{}  THEN  Auto)

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