context: It is highly likely that Bernhard is green. It is probable that Mary went to the bedroom. There is a very good chance that John discarded the milk.
hypothesis: There is almost no chance that 'John discarded the milk and Bernhard is green'.
valid_hypothesis: It is likely that 'John discarded the milk and Bernhard is green'.
invalid_hypothesis: There is almost no chance that 'John discarded the milk and Bernhard is green'.
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
    0.9::factA.
    0.7::factB.
    0.8::factC.
    
  
    %hop2
    conclusion:-and(factC,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'John discarded the milk and Bernhard is green'.