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At: zero rank all vars 1 2 1 1 1 1 1 2 1 1

1. z: Formula
2. x: Var

0 = 0 (v:Var. x = v)

By: Analyze 0

Generated subgoal:

13. 0 = 0
v:Var. x = v


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impliesequalintnatural_numberexists