∀[es:EO]. ∀[e,e':E]. ([e, e'] ~ []) supposing ((e' <loc e) and (loc(e) = loc(e') ∈ Id))
{ (UnivCD THENA Auto) }
1. es : EO
2. e : E
3. e' : E
4. loc(e) = loc(e') ∈ Id
5. (e' <loc e)
⊢ [e, e'] ~ []