Nuprl - Pf append is member lemma 1 1 1

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At: append is member lemma 1 1 1

1. T: Type
2. eq: {T=}
3. eq TT
4. x,y:T. eq(x,y) x = y
5. L: T List
6. x: T
7. M,N:T List. nil = (M @ (x.N))

False

By: Analyze -1 THEN Analyze -1

Generated subgoal:

1 7. M: T List
8. N: T List
9. nil = (M @ (x.N))
False

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