context: There is almost no chance that Daniel left the apple. We believe that Sandra put down the milk. We doubt that Jeff went to the bedroom.
hypothesis: There is a better than even chance that 'Daniel left the apple and Sandra put down the milk'.
valid_hypothesis: There is almost no chance that 'Daniel left the apple and Sandra put down the milk'.
invalid_hypothesis: There is a better than even chance that 'Daniel left the apple and Sandra put down 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
    0.02::factA.
    0.75::factB.
    0.2::factC.
    
  
    %hop2
    conclusion:-and(factA,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Daniel left the apple and Sandra put down the milk'.