∀s:DSet. (s List ∈ DSet)
{ (Unfold `dset_list` 0 THEN Auto THEN D 0 THEN Reduce 0 THEN Auto) }
1. s : DSet@i'
2. x : |s| List
3. y : |s| List
4. ↑(x =b y)
⊢ x = y ∈ (|s| List)
1. s : DSet@i'
2. x : |s| List
3. y : |s| List
4. x = y ∈ (|s| List)
⊢ ↑(x =b y)