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-# To-do list
-
-In no particular order. Some of the following might need changes to the
-Isabelle prover itself?
-
-[ ] Typing information is implicit in context facts, and the collection must be
-    searched every time we need a type for a term. For performance, should
-    probably implement dedicated tables.
-
-[ ] Tactic-based term elaboration has (at least) two problems:
-    1. `assume(s)` clauses don't accept schematic vars, and
-    2. it often results in overly-flexible subgoals that the typechecker
-    doesn't solve.
-    Will likely need an elaborator integrated into Isabelle's syntax checking.