context: It is improbable that Mary grabbed the milk. It is likely that Jason is tired. Chances are slight that Bernhard is a rhino.
hypothesis: It is likely that 'Jason is tired and Bernhard is a rhino'.
valid_hypothesis: It is highly unlikely that 'Jason is tired and Bernhard is a rhino'.
invalid_hypothesis: It is likely that 'Jason is tired and Bernhard is a rhino'.
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
    0.1::factA.
    0.7::factB.
    0.1::factC.
    
  
    %hop2
    conclusion:-and(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Jason is tired and Bernhard is a rhino'.