Sort search results in order of relevance, where relevance =
a) better if 0 premises for intro or 1 premise for elim/dest rules
b) better if substitution size wrt to current goal is smaller
Only applies to intro, dest, elim, and simp
(contributed by Rafal Kolanski, NICTA)
use "../settings.ML";
no_document use_thy "While_Combinator";
use_thy "simp";
use_thy "WFrec";
use_thy "Partial";