Nuprl - Proof: length of not nil 3 1

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At: length of not nil 3 1

1. A : Type
2. A List
3. u : A
4. v : A List
5. ||v||+1

u.v = nil

By:	BackThru `cons_neq_nil`

Generated subgoals:

None

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IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html