context: There is almost no chance that Fred moved to the office. It is almost certain that Gertrude is a cat. We doubt that Brian is green.
hypothesis: Chances are slight that 'Gertrude is a cat' or 'Brian is green' or both.
valid_hypothesis: It is almost certain that 'Gertrude is a cat' or 'Brian is green' or both.
invalid_hypothesis: Chances are slight that 'Gertrude is a cat' or 'Brian is green' or both.
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
    0.02::factA.
    0.95::factB.
    0.2::factC.
    
  
    %hop2
    conclusion:-or(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Gertrude is a cat' or 'Brian is green' or both.