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Step * 3 2 of Lemma assert_of_band2

.....wf..... 
1. p : 𝔹
2. ¬↑p
⊢ istype(⋂:False. 𝔹)
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Latex:

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Latex:
.....wf..... 
1.  p  :  \mBbbB{}
2.  \mneg{}\muparrow{}p
\mvdash{}  istype(\mcap{}:False.  \mBbbB{})


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Latex:
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