context: There is almost no chance that Bernhard is a rhino. There is almost no chance that Mary took the football. It is probable that John went to the office.
hypothesis: It is almost certain that 'Bernhard is a rhino and Mary took the football'.
valid_hypothesis: It is impossible that 'Bernhard is a rhino and Mary took the football'.
invalid_hypothesis: It is almost certain that 'Bernhard is a rhino and Mary took the football'.
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.
    0.02::factB.
    0.7::factC.
    
  
    %hop2
    conclusion:-and(factA,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Bernhard is a rhino and Mary took the football'.