It is impossible that Julius is yellow. It is almost certain that Daniel got the milk. It is improbable that Jessica is a sheep. There is a better than even chance that if 'Daniel got the milk and Jessica is a sheep' then Fred went to the garden. We doubt that if 'Julius is yellow and Jessica is a sheep' then Brian is a rhino. It is highly unlikely that if 'Daniel got the milk and Jessica is a sheep' then Bernhard is a frog.
It is highly likely that 'Jessica is a sheep and Julius is yellow'.
It is impossible that 'Jessica is a sheep and Julius is yellow'.
It is highly likely that 'Jessica is a sheep and Julius is yellow'.

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

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

  query(conclusion).
  
'Jessica is a sheep and Julius is yellow'.