set(auto). formula_list(usable). all x (man(x)->mortal(x)). % For all x, if x is a man then x is mortal man(socrates). % Socrates is a man end_of_list.
=========== start of search =========== given clause #1: (wt=2) 2 [] man(socrates). given clause #2: (wt=2) 3 [hyper,2,1] mortal(socrates). Search stopped because sos empty. Search stopped because sos empty. ============ end of search ===========