It is likely that Jessica is a mouse. We believe that John moved to the garden. It is probably not the case that Lily is green. It is probable that if 'Lily is green' or 'Jessica is a mouse' or both then Winona is a wolf. Chances are about even that if either 'Lily is green' or 'John moved to the garden' but not both then Greg is a lion. It is improbable that if 'Jessica is a mouse and John moved to the garden' then Brian is a lion.
Chances are about even that either 'Winona is a wolf' or 'Greg is a lion' but not both.
Chances are about even that either 'Winona is a wolf' or 'Greg is a lion' but not both.
It is impossible that either 'Winona is a wolf' or 'Greg is a lion' 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
  0.7::factA.
  0.75::factB.
  0.25::factC.
  %hop1
  0.7::factX:-or(factC,factA).
  0.5::factY:-xor(factC,factB).
  0.1::factZ:-and(factA,factB).

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

  query(conclusion).
  
Either 'Winona is a wolf' or 'Greg is a lion' but not both.