IF 
asset ?x low
salary ?x low
THEN
credit ?x bad
#####
IF
asset ?x low
salary ?x high
parent ?x ?y
asset ?y high
THEN
credit ?x good 
#####
IF
asset ?x high
THEN
credit ?x good
#####
IF 
married ?x ?z
asset ?x ?y
THEN
asset ?z ?y
#####
WM
salary bob high
salary mary low
asset bob low
married bob mary
married mary bob
parent bob bill
asset sue high
married sue bill
married bill sue
asset pat low
#####
CONJECTURES
credit bob good
credit mary bad
credit pat bad