context: There is almost no chance that Daniel left the football. We doubt that John went to the office. There is a very good chance that Jessica is a cat.
hypothesis: It is probable that 'Daniel left the football' or 'John went to the office' or both.
valid_hypothesis: It is unlikely that 'Daniel left the football' or 'John went to the office' or both.
invalid_hypothesis: It is probable that 'Daniel left the football' or 'John went to the office' 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.
    0.2::factB.
    0.8::factC.
    
  
    %hop2
    conclusion:-or(factA,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Daniel left the football' or 'John went to the office' or both.