IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
cons member1 1. T : Type
2. l : T List
3. a : T 4. x : T 5. i:. i<||[a / l]|| & x = [a / l][i]
x = a (i:. i<||l|| & x = l[i])
By:
ExRepD THEN MoveToConcl -1 THEN MoveToConcl -1 THEN CaseNatZero `i'