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At: non nil is member 1 1

1. 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

nil nil T List (x:T. x(eq) nil)

By:
Analyze 0
THEN
Repeat (UnfoldTopAb -1)


Generated subgoal:

18. (nil = nil T List)False
x:T. x(eq) nil

About:
listnilboolassertapplyfunctionuniversememberimpliesallexists

(9steps) PrintForm Definitions Lemmas list 3 jlc Sections Support(jlc) Doc