It is unlikely that Julius is yellow. There is almost no chance that Emily is a wolf. There is little chance that Bernhard is a rhino. There is almost no chance that if 'Bernhard is a rhino' or 'Emily is a wolf' or both then Mary went to the hallway. It is unlikely that if 'Emily is a wolf' or 'Bernhard is a rhino' or both then Lily is a lion. It is certain that if 'Bernhard is a rhino and Julius is yellow' then John moved to the office.
There is little chance that either 'John moved to the office' or 'Bernhard is a rhino' but not both.
There is little chance that either 'John moved to the office' or 'Bernhard is a rhino' but not both.
It is almost certain that either 'John moved to the office' or 'Bernhard 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
  0.2::factA.
  0.02::factB.
  0.1::factC.
  %hop1
  0.02::factX:-or(factC,factB).
  0.2::factY:-or(factB,factC).
  1.0::factZ:-and(factC,factA).

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

  query(conclusion).
  
Either 'John moved to the office' or 'Bernhard is a rhino' but not both.