context: It is unlikely that Julius is white. There is a very good chance that John moved to the office. It is almost certain that Bernhard is a rhino.
hypothesis: Chances are slight that 'Bernhard is a rhino and John moved to the office'.
valid_hypothesis: We believe that 'Bernhard is a rhino and John moved to the office'.
invalid_hypothesis: Chances are slight that 'Bernhard is a rhino and John moved to the office'.
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
    0.2::factA.
    0.8::factB.
    0.95::factC.
    
  
    %hop2
    conclusion:-and(factC,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Bernhard is a rhino and John moved to the office'.