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At: non nil is member


T:Type, eq:{T}, L:T List. L nil (x:T. x(eq) L)

By:
Analyze 0
THEN
Analyze 0
THEN
Equivalence -1
THEN
UnivCD


Generated subgoal:

11. T: Type
2. eq: {T}
3. eq TT
4. x:T. eq(x,x)
5. x,y:T. eq(x,y) eq(y,x)
6. x,y,z:T. eq(x,y) eq(y,z) eq(x,z)
7. L: T List
8. L nil
x:T. x(eq) L

About:
listnilassertuniverseimpliesallexists

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