There is little chance that Julius is white. It is probable that Sandra left the milk. It is almost certain that Jessica is a cat. We believe that if 'Jessica is a cat and Sandra left the milk' then Greg is a lion. It is highly likely that if either 'Sandra left the milk' or 'Julius is white' but not both then Mary went to the kitchen. Chances are about even that if 'Jessica is a cat' or 'Sandra left the milk' or both then Lily is yellow.
There is almost no chance that 'Greg is a lion and Sandra left the milk'.
Chances are about even that 'Greg is a lion and Sandra left the milk'.
There is almost no chance that 'Greg is a lion and Sandra left the milk'.

  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.
  0.95::factC.
  %hop1
  0.75::factX:-and(factC,factB).
  0.9::factY:-xor(factB,factA).
  0.5::factZ:-or(factC,factB).

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

  query(conclusion).
  
'Greg is a lion and Sandra left the milk'.