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At: rest symm rel 1

1. n: {1...}
2. m: n
3. E: nnProp
4. Sym x,y:n. x E y

Sym x,y:m. x E y

By: Analyze 0

Generated subgoal:

15. a: m
b:m. (a E b) (b E a)


About:
natural_numberfunctionpropallimplies