It is highly likely that Winona is a wolf. It is likely that Sandra left the milk. It is almost certain that Julius is white. There is a better than even chance that if 'Julius is white' or 'Sandra left the milk' or both then Brian is a rhino. It is unlikely that if 'Winona is a wolf and Sandra left the milk' then Bernhard is a swan. It is probably the case that if either 'Sandra left the milk' or 'Julius is white' but not both then Lily is a frog.
It is likely that 'Bernhard is a swan' or 'Sandra left the milk' or both.
It is likely that 'Bernhard is a swan' or 'Sandra left the milk' or both.
Chances are slight that 'Bernhard is a swan' or 'Sandra left the milk' or both.

  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
  0.9::factA.
  0.7::factB.
  0.95::factC.
  %hop1
  0.6::factX:-or(factC,factB).
  0.2::factY:-and(factA,factB).
  0.7::factZ:-xor(factB,factC).

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

  query(conclusion).
  
'Bernhard is a swan' or 'Sandra left the milk' or both.