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At: zero rank valid or falsifiable 1 1 1 1 1 1 2 1 2 1
1. L: Sequent List
2. eqS: {Sequent=}
3. eqF: {Formula=}
4. sL.((s) = 0)
5. sL.disjoint(eqF;s.H;s.C)
6. hyp: Formula List
7. concl: Formula List
8. < hyp,concl > (eqS) L
9. disjoint(eqF;hyp;concl)
10. (v.if v(eqF) hyp3 ;v(eqF) concl3 else 3 fi) Assignment

(v.if v(eqF) hyp3 ;v(eqF) concl3 else 3 fi) | < hyp,concl >
By:
Analyze 0
THEN
Reduce 0
Generated subgoals:

1 Fhyp.(v.if v(eqF) hyp3 ;v(eqF) concl3 else 3 fi) |= F
2 Fconcl.(v.if v(eqF) hyp3 ;v(eqF) concl3 else 3 fi) | F

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lambdaifthenelsepairlistequal
intapplynatural_numberassertmember