context: Chances are slight that Mary moved to the office. There is a better than even chance that Emily is a sheep. We believe that Julius is gray.
hypothesis: It is almost certain that 'Julius is gray and Mary moved to the office'.
valid_hypothesis: Chances are slight that 'Julius is gray and Mary moved to the office'.
invalid_hypothesis: It is almost certain that 'Julius is gray and Mary moved to the office'.
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.
    0.6::factB.
    0.75::factC.
    
  
    %hop2
    conclusion:-and(factC,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Julius is gray and Mary moved to the office'.