It is likely that Julius is yellow. There is little chance that Jessica is a cat. Chances are slight that Emily is a sheep. We believe that if 'Julius is yellow' or 'Emily is a sheep' or both then Bernhard is a lion. We doubt that if either 'Julius is yellow' or 'Emily is a sheep' but not both then Lily is gray. Chances are about even that if 'Julius is yellow and Jessica is a cat' then John left the apple.
There is a better than even chance that 'Bernhard is a lion' or 'Jessica is a cat' or both.
There is a better than even chance that 'Bernhard is a lion' or 'Jessica is a cat' or both.
It is improbable that 'Bernhard is a lion' or 'Jessica is a cat' 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
  0.7::factA.
  0.1::factB.
  0.1::factC.
  %hop1
  0.75::factX:-or(factA,factC).
  0.2::factY:-xor(factA,factC).
  0.5::factZ:-and(factA,factB).

  %hop2
  conclusion:-or(factX,factB).

  query(conclusion).
  
'Bernhard is a lion' or 'Jessica is a cat' or both.