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At: decidable l exists 2

1. A : Type
2. F : AProp
3. A List
4. k:A. Dec(F(k))
5. u : A
6. v : A List
7. Dec((kv.F(k)))
  Dec((k[u / v].F(k)))


By: RWO Thm* P:(TProp), x:TL:T List. (y[x / L].P(y))  P(x (yL.P(y)) 0


Generated subgoal:

1   Dec(F(u (kv.F(k)))
1 step

About:
listconsdecidablefunctionuniverseproporall
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