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At: list rank wf 1 1 2 1

1. L: Formula List
2. u: Formula
3. v: Formula List
4. reduce(x,y. (x)+y;0;v)

(u)+reduce(x,y. (x)+y;0;v)

By: GenConcl (reduce(x,y. (x)+y;0;v) = n)

Generated subgoal:

15. n:
6. reduce(x,y. (x)+y;0;v) = n
(u)+n


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