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44d62c7Better if unification substitutes rather than let bindsEdwin Brady cbc60ebUnification, and unify tacticEdwin Brady 77be0d0Simple parser for data typesEdwin Brady 6a6a048No mucking about with de Bruijn indices in proof constructionEdwin Brady 867f092Changed evaluatorEdwin Brady 56309a5Minor parser changesEdwin Brady ccd64c7Beginning of proof shellEdwin Brady