Chances are slight that Brian is white. It is unlikely that Jessica is a sheep. There is a better than even chance that Julius is a lion. Chances are about even that if either 'Brian is white' or 'Jessica is a sheep' but not both then Bernhard is yellow. We doubt that if 'Jessica is a sheep and Julius is a lion' then Daniel put down the milk. Chances are about even that if 'Jessica is a sheep and Julius is a lion' then Lily is green.
Chances are slight that either 'Lily is green' or 'Jessica is a sheep' but not both.
Chances are slight that either 'Lily is green' or 'Jessica is a sheep' but not both.
It is likely that either 'Lily is green' or 'Jessica is a sheep' 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
  0.1::factA.
  0.2::factB.
  0.6::factC.
  %hop1
  0.5::factX:-xor(factA,factB).
  0.2::factY:-and(factB,factC).
  0.5::factZ:-and(factB,factC).

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

  query(conclusion).
  
Either 'Lily is green' or 'Jessica is a sheep' but not both.