At: list quo choice 2 1 1 1 1 1 1
1. q: 
2.
0 < q
3. E:
q*

q*
Prop
4. (EquivRel x,y:
q*. x E y) & (
x,y:
q*. Dec(x E y))
5. q = 0
6. x:
q*
7. y:
q*
(x E y) 
Id(x) = Id(y)
q*
By:
Reduce 0
THEN
RWH
(LemmaC
Thm*
q:
, x:
q*. q = 0 
x = nil)
0
Generated subgoal:1 | (nil E nil)  nil = nil q* |
About: