:- use_module(library(clpbn)).
:- set_clpbn_flag(solver, bp).
%:- set_clpbn_flag(solver, jt).
%
% B F
% \ /
% A
b(B) :-
b_table(BDist),
{ B = b with p([b1, b2], BDist) }.
f(F) :-
f_table(FDist),
{ F = f with p([f1, f2], FDist) }.
a(A) :-
b(B),
f(F),
a_table(ADist),
{ A = a with p([a1, a2], ADist, [B, F]) }.
b_table([0.005, 0.995]).
f_table([0.03, 0.97]).
a_table([0.992, 0.99, 0.2, 0.003,
0.008, 0.01, 0.8, 0.997]).
