| 1 | 11. ( < y1.hyp,y2.(M @ N) > ) < ( < hyp,M @ (y1   y2.N) > ) 
( L:Sequent List.
s L.( (s) = 0)
& ( s L.|= s  |= < y1.hyp,y2.(M @ N) > )
& ( a:Assignment. s L.a | s  a | < y1.hyp,y2.(M @ N) > )) L:Sequent List.
s L.( (s) = 0)
& ( s L.|= s  |= < hyp,M @ (y1   y2.N) > )
& ( a:Assignment. s L.a | s  a | < hyp,M @ (y1   y2.N) > ) |