context: It is likely that Brian is yellow. It is probably not the case that John moved to the garden. There is almost no chance that Jessica is a cat.
hypothesis: We believe that 'Jessica is a cat and John moved to the garden'.
valid_hypothesis: It is impossible that 'Jessica is a cat and John moved to the garden'.
invalid_hypothesis: We believe that 'Jessica is a cat and John moved to the garden'.
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
    0.7::factA.
    0.25::factB.
    0.02::factC.
    
  
    %hop2
    conclusion:-and(factC,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Jessica is a cat and John moved to the garden'.