context: There is a very good chance that Sandra left the football. There is a better than even chance that Julius is a rhino. There is a better than even chance that Mary took the milk.
hypothesis: Chances are about even that 'Mary took the milk and Sandra left the football'.
valid_hypothesis: Chances are about even that 'Mary took the milk and Sandra left the football'.
invalid_hypothesis: It is certain that 'Mary took the milk and Sandra left the football'.
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
    0.8::factA.
    0.6::factB.
    0.6::factC.
    
  
    %hop2
    conclusion:-and(factC,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Mary took the milk and Sandra left the football'.