It is highly likely that Jeff moved to the office. It is impossible that Winona is a mouse. It is probably the case that Greg is a rhino. It is impossible that if 'Jeff moved to the office and Winona is a mouse' then Bernhard is a lion. Chances are slight that if either 'Greg is a rhino' or 'Winona is a mouse' but not both then Daniel left the football. It is impossible that if either 'Winona is a mouse' or 'Jeff moved to the office' but not both then John went to the hallway.
There is almost no chance that either 'Bernhard is a lion' or 'Jeff moved to the office' but not both.
It is highly likely that either 'Bernhard is a lion' or 'Jeff moved to the office' but not both.
There is almost no chance that either 'Bernhard is a lion' or 'Jeff moved to the office' 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
  0.9::factA.
  0.0::factB.
  0.7::factC.
  %hop1
  0.0::factX:-and(factA,factB).
  0.1::factY:-xor(factC,factB).
  0.0::factZ:-xor(factB,factA).

  %hop2
  conclusion:-xor(factX,factA).

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