context: We believe that Mary got the football. It is probably not the case that Jessica is a cat. It is almost certain that John went to the office.
hypothesis: It is probably not the case that 'Jessica is a cat and John went to the office'.
valid_hypothesis: It is probably not the case that 'Jessica is a cat and John went to the office'.
invalid_hypothesis: There is a very good chance that 'Jessica is a cat and John went 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
    0.75::factA.
    0.25::factB.
    0.95::factC.
    
  
    %hop2
    conclusion:-and(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Jessica is a cat and John went to the office'.