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At: formula and left sound 1 1 1 1 2 1
1. concl: Formula List
2. M: Formula List
3. N: Formula List
4. q: Formula
5. r: Formula
6. a: Assignment
7. a |= < M @ (qr.N),concl >

a |= < [q; r/ M @ N],concl > a | < [q; r/ M @ N],concl >
By: Choose [1]
Generated subgoal:

1 a |= < [q; r/ M @ N],concl >

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orpairconslist