simplified meaning of ProofContext.verbose;
eliminated strange ProofContext.setmp_verbose_CRITICAL;
less confusing printing of (cumulative) unnamed facts;
(* Title: Cube/ROOT.ML
ID: $Id$
Author: Tobias Nipkow
Copyright 1992 University of Cambridge
The Lambda-Cube a la Barendregt.
*)
use_thys ["Cube", "Example"];