There is almost no chance that Greg is white. There is little chance that Sandra got the football. It is highly likely that Julius is a lion. It is probably the case that if either 'Julius is a lion' or 'Greg is white' but not both then John put down the apple. It is almost certain that if either 'Greg is white' or 'Julius is a lion' but not both then Brian is yellow. It is improbable that if either 'Julius is a lion' or 'Sandra got the football' but not both then Lily is a rhino.
There is little chance that either 'Julius is a lion' or 'Lily is a rhino' but not both.
There is a very good chance that either 'Julius is a lion' or 'Lily is a rhino' but not both.
There is little chance that either 'Julius is a lion' or 'Lily 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
  0.02::factA.
  0.1::factB.
  0.9::factC.
  %hop1
  0.7::factX:-xor(factC,factA).
  0.95::factY:-xor(factA,factC).
  0.1::factZ:-xor(factC,factB).

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

  query(conclusion).
  
Either 'Julius is a lion' or 'Lily is a rhino' but not both.