context: Chances are about even that Emily is a wolf. It is certain that Bernhard is a lion. Chances are slight that John got the milk.
hypothesis: It is almost certain that 'John got the milk and Emily is a wolf'.
valid_hypothesis: It is highly unlikely that 'John got the milk and Emily is a wolf'.
invalid_hypothesis: It is almost certain that 'John got the milk and Emily is a wolf'.
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
    0.5::factA.
    1.0::factB.
    0.1::factC.
    
  
    %hop2
    conclusion:-and(factC,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'John got the milk and Emily is a wolf'.