context: It is certain that Daniel got the milk. It is highly unlikely that Julius is a lion. It is unlikely that Bill went to the office.
hypothesis: There is a better than even chance that 'Julius is a lion and Daniel got the milk'.
valid_hypothesis: It is highly unlikely that 'Julius is a lion and Daniel got the milk'.
invalid_hypothesis: There is a better than even chance that 'Julius is a lion and Daniel got the milk'.
problog: 
    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
    1.0::factA.
    0.05::factB.
    0.2::factC.
    
  
    %hop2
    conclusion:-and(factB,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Julius is a lion and Daniel got the milk'.