Nuprl - Pf zero_rank_valid_or_falsifiable 1 1 1 1 1 1 2

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At: zero rank valid or falsifiable 1 1 1 1 1 1 2

1. L: Sequent List
2. eqS: {Sequent=}
3. eqF: {Formula=}
4. sL.((s) = 0)
5. sL.disjoint(eqF;s.H;s.C)
6. x: Sequent
7. x(eqS) L
8. disjoint(eqF;x.H;x.C)
9. (v.if v(eqF) x.H3 ;v(eqF) x.C3 else 3 fi) Assignment

a:Assignment. sL.a | s

By: Witness v.if v(eqF) x.H3 ;v(eqF) x.C3 else 3 fi

Generated subgoal:

1 sL.(v.if v(eqF) x.H3 ;v(eqF) x.C3 else 3 fi) | s

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