probabilistic_method( proximity(List,Pivot,_Set,Probs) ) :-
	rationals_subtract_list_from( List, Pivot, Subtr ),
	rationals_abs_list( Subtr, Abstr ),
	rationals_add_list( Abstr, Sum ),
	rationals_subtract_list_from( Abstr, Sum, Diffs ),
	rationals_to_probabilities( Diffs, Probs ).