At: formula and right sat 1 1 1 1 2 1
1. hyp: Formula List
2. M: Formula List
3. N: Formula List
4. q: Formula
5. r: Formula
6. a: Assignment
7. a |= q
8. 
F
hyp.a |
F
Fhyp.a | F 
FM.a |= F a |= q & a |= r FN.a |= F
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