t:provingground.learning.Sort[Z,X]):provingground.learning.SortList.Cons[Z,X,U]"></a><a id="::[Z,X](Sort[Z,X]):Cons[Z,X,::[X,U]]"></a> <span class="permalink"><a href="../../provingground/learning/SortList$$Cons.html#::[Z,X](that:provingground.learning.Sort[Z,X]):provingground.learning.SortList.Cons[Z,X,U]" title="Permalink"><i class="material-icons"></i></a></span> <span class="modifier_kind"><span class="modifier"></span> <span class="kind">def</span></span> <span class="symbol"><span class="name" titl