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At: decidable disjoint 1 2
1. T: Type
2. eq: TT
3. L1: T List
4. L2: T List
5. u: T
6. v: T List
7. Dec(disjoint(eq;v;L2))

Dec(disjoint(eq;(u.v);L2))
By:
OnHyps [-1;0] (i.Unfold `disjoint` i)
THEN
Rewrite (HigherC list_all_unrollC) 0
Generated subgoal:

17. Dec(xv.x(eq) L2)
Dec(u(eq) L2 & xv.x(eq) L2)

About:
listconsboolassertdecidablefunctionuniverseand

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