It is likely that Julius is white. It is certain that Emily is a wolf. We doubt that Brian is a lion. It is unlikely that if either 'Emily is a wolf' or 'Julius is white' but not both then Bernhard is yellow. There is almost no chance that if 'Julius is white and Brian is a lion' then Daniel dropped the milk. It is unlikely that if either 'Emily is a wolf' or 'Julius is white' but not both then Mary went to the office.
It is probably the case that either 'Daniel dropped the milk' or 'Brian is a lion' but not both.
It is unlikely that either 'Daniel dropped the milk' or 'Brian is a lion' but not both.
It is probably the case that either 'Daniel dropped the milk' or 'Brian 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.
  1.0::factB.
  0.2::factC.
  %hop1
  0.2::factX:-xor(factB,factA).
  0.02::factY:-and(factA,factC).
  0.2::factZ:-xor(factB,factA).

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

  query(conclusion).
  
Either 'Daniel dropped the milk' or 'Brian is a lion' but not both.