major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
%FIXME
%\chapter{Basic Concepts}\label{ch:basics}
%\section{The Isar proof language}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: "isar-ref"
%%% End: