We doubt that Lily is a rhino. It is impossible that Fred dropped the milk. It is certain that John moved to the office. It is impossible that if 'Lily is a rhino and John moved to the office' then Bernhard is yellow. There is almost no chance that if either 'Lily is a rhino' or 'Fred dropped the milk' but not both then Bill went to the kitchen. There is a better than even chance that if 'Lily is a rhino' or 'Fred dropped the milk' or both then Sandra left the apple.
It is certain that 'Lily is a rhino and John moved to the office'.
We doubt that 'Lily is a rhino and John moved to the office'.
It is certain that 'Lily is a rhino and John moved to the office'.

  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.
  0.0::factB.
  1.0::factC.
  %hop1
  0.0::factX:-and(factA,factC).
  0.02::factY:-xor(factA,factB).
  0.6::factZ:-or(factA,factB).

  %hop2
  conclusion:-and(factA,factC).

  query(conclusion).
  
'Lily is a rhino and John moved to the office'.