It is probably not the case that Daniel got the apple. It is certain that Winona is a wolf. It is unlikely that Mary dropped the milk. It is almost certain that if 'Daniel got the apple' or 'Winona is a wolf' or both then Julius is green. There is a very good chance that if 'Winona is a wolf' or 'Mary dropped the milk' or both then Brian is a swan. It is likely that if 'Winona is a wolf' or 'Mary dropped the milk' or both then Lily is gray.
There is a very good chance that 'Brian is a swan' or 'Mary dropped the milk' or both.
There is a very good chance that 'Brian is a swan' or 'Mary dropped the milk' or both.
There is almost no chance that 'Brian is a swan' or 'Mary dropped 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
  0.25::factA.
  1.0::factB.
  0.2::factC.
  %hop1
  0.95::factX:-or(factA,factB).
  0.8::factY:-or(factB,factC).
  0.7::factZ:-or(factB,factC).

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

  query(conclusion).
  
'Brian is a swan' or 'Mary dropped the milk' or both.