It is improbable that Jessica is a mouse. There is little chance that Julius is green. Chances are slight that Lily is a rhino. It is likely that if 'Lily is a rhino' or 'Julius is green' or both then Mary grabbed the milk. There is a better than even chance that if 'Lily is a rhino and Jessica is a mouse' then Emily is a sheep. It is probably not the case that if 'Julius is green' or 'Jessica is a mouse' or both then Winona is a wolf.
It is certain that 'Winona is a wolf' or 'Lily is a rhino' or both.
Chances are slight that 'Winona is a wolf' or 'Lily is a rhino' or both.
It is certain that 'Winona is a wolf' or 'Lily is a rhino' 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
  0.1::factA.
  0.1::factB.
  0.1::factC.
  %hop1
  0.7::factX:-or(factC,factB).
  0.6::factY:-and(factC,factA).
  0.25::factZ:-or(factB,factA).

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

  query(conclusion).
  
'Winona is a wolf' or 'Lily is a rhino' or both.