There is almost no chance that Mary went to the office. It is impossible that Lily is a rhino. Chances are slight that Bernhard is a swan. We doubt that if 'Lily is a rhino and Mary went to the office' then Bill got the milk there. There is a better than even chance that if 'Mary went to the office' or 'Bernhard is a swan' or both then Daniel took the football. It is almost certain that if 'Lily is a rhino' or 'Bernhard is a swan' or both then Julius is a rhino.
It is highly unlikely that 'Julius is a rhino and Daniel took the football'.
It is highly unlikely that 'Julius is a rhino and Daniel took the football'.
We believe that 'Julius is a rhino and Daniel took the football'.

  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
  0.02::factA.
  0.0::factB.
  0.1::factC.
  %hop1
  0.2::factX:-and(factB,factA).
  0.6::factY:-or(factA,factC).
  0.95::factZ:-or(factB,factC).

  %hop2
  conclusion:-and(factZ,factY).

  query(conclusion).
  
'Julius is a rhino and Daniel took the football'.