substantial speedup of assumption and elim-resolution: Logic.assum_problems refrains from eager application of parameters, discriminate via Term.could_unify before invoking full unification (assumes terms in beta-normal form, as do higher term net operations anyway);
(* ID: $Id$ *)
use_thy "Basic";
use_thy "Blast";
use_thy "Force";
use_thy "Forward";
use_thy "Tacticals";
use_thy "find2";