It is certain that Daniel grabbed the milk. It is highly unlikely that Antoine is hungry. There is almost no chance that Brian is a rhino. There is almost no chance that if 'Antoine is hungry' or 'Brian is a rhino' or both then Lily is white. There is a very good chance that if 'Brian is a rhino and Daniel grabbed the milk' then Winona is a mouse. It is highly unlikely that if 'Antoine is hungry' or 'Daniel grabbed the milk' or both then Jessica is a sheep.
It is impossible that either 'Winona is a mouse' or 'Brian is a rhino' but not both.
It is impossible that either 'Winona is a mouse' or 'Brian is a rhino' but not both.
It is probable that either 'Winona is a mouse' or 'Brian is a rhino' but not 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
  1.0::factA.
  0.05::factB.
  0.02::factC.
  %hop1
  0.02::factX:-or(factB,factC).
  0.8::factY:-and(factC,factA).
  0.05::factZ:-or(factB,factA).

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

  query(conclusion).
  
Either 'Winona is a mouse' or 'Brian is a rhino' but not both.