1 | 4. f hyp.( (f) > 0) L:Sequent List.
s L.( (s) = 0) & ( s L.|= s  |= < hyp,concl > ) & ( a:Assignment. s L.a | s  a | < hyp,concl > ) |
2 | 4.  f hyp.( (f) > 0) L:Sequent List.
s L.( (s) = 0) & ( s L.|= s  |= < hyp,concl > ) & ( a:Assignment. s L.a | s  a | < hyp,concl > ) |