At: formula not right sound 1 1 1 1 2 2
1. hyp: Formula List
2. M: Formula List
3. N: Formula List
4. f2: Formula
5. a: Assignment
6. a |
< hyp,M @ (
f2.N) >
a |= < f2.hyp,M @ N > 
a | < f2.hyp,M @ N >
By: DNth 2 0
Generated subgoal:| 1 | a | < f2.hyp,M @ N > |
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