context: It is probably not the case that John got the milk. It is certain that Julius is a rhino. It is highly likely that Lily is white.
hypothesis: It is highly likely that 'Julius is a rhino and Lily is white'.
valid_hypothesis: It is highly likely that 'Julius is a rhino and Lily is white'.
invalid_hypothesis: There is almost no chance that 'Julius is a rhino and Lily is white'.
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
    0.25::factA.
    1.0::factB.
    0.9::factC.
    
  
    %hop2
    conclusion:-and(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Julius is a rhino and Lily is white'.