It is probably not the case that Brian is a rhino. It is unlikely that Jeff moved to the garden. It is probably not the case that Greg is a swan. It is impossible that if 'Jeff moved to the garden and Greg is a swan' then Lily is white. It is impossible that if 'Greg is a swan and Jeff moved to the garden' then Winona is a wolf. It is probably the case that if 'Jeff moved to the garden' or 'Brian is a rhino' or both then Daniel took the apple.
It is probably not the case that either 'Greg is a swan' or 'Lily is white' but not both.
It is probably not the case that either 'Greg is a swan' or 'Lily is white' but not both.
It is likely that either 'Greg is a swan' or 'Lily is white' 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
  0.25::factA.
  0.2::factB.
  0.25::factC.
  %hop1
  0.0::factX:-and(factB,factC).
  0.0::factY:-and(factC,factB).
  0.7::factZ:-or(factB,factA).

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

  query(conclusion).
  
Either 'Greg is a swan' or 'Lily is white' but not both.