Chances are slight that Brian is a lion. It is likely that John went to the bedroom. It is probable that Mary took the football. It is certain that if 'John went to the bedroom' or 'Brian is a lion' or both then Bernhard is green. We believe that if 'Mary took the football and John went to the bedroom' then Winona is a wolf. There is almost no chance that if either 'Mary took the football' or 'Brian is a lion' but not both then Greg is a frog.
It is probably the case that 'John went to the bedroom and Winona is a wolf'.
It is probably not the case that 'John went to the bedroom and Winona is a wolf'.
It is probably the case that 'John went to the bedroom and Winona is a wolf'.

  and(A,B) :- A,B.
  or(A,B) :- A;B.
  nand(A,B) :- not(and(A,B)).
  nor(A,B) :- not(or(A,B)).
  xor(A,B) :- or(A,B), nand(A,B).

  %hop0
  0.1::factA.
  0.7::factB.
  0.7::factC.
  %hop1
  1.0::factX:-or(factB,factA).
  0.75::factY:-and(factC,factB).
  0.02::factZ:-xor(factC,factA).

  %hop2
  conclusion:-and(factB,factY).

  query(conclusion).
  
'John went to the bedroom and Winona is a wolf'.