It is highly likely that Daniel got the milk. We believe that Bernhard is gray. It is highly likely that Lily is a rhino. It is improbable that if 'Lily is a rhino and Daniel got the milk' then Emily is a mouse. It is unlikely that if either 'Bernhard is gray' or 'Lily is a rhino' but not both then John went to the hallway. It is certain that if 'Bernhard is gray' or 'Lily is a rhino' or both then Greg is a frog.
It is highly unlikely that 'John went to the hallway and Daniel got the milk'.
It is highly unlikely that 'John went to the hallway and Daniel got the milk'.
There is a very good chance that 'John went to the hallway and Daniel got the milk'.

  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.
  0.75::factB.
  0.9::factC.
  %hop1
  0.1::factX:-and(factC,factA).
  0.2::factY:-xor(factB,factC).
  1.0::factZ:-or(factB,factC).

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

  query(conclusion).
  
'John went to the hallway and Daniel got the milk'.