context: It is probably not the case that Gertrude is a sheep. It is probably the case that Sumit is thirsty. It is certain that Mary went to the bedroom.
hypothesis: It is likely that 'Gertrude is a sheep and Sumit is thirsty'.
valid_hypothesis: We doubt that 'Gertrude is a sheep and Sumit is thirsty'.
invalid_hypothesis: It is likely that 'Gertrude is a sheep and Sumit is thirsty'.
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
    0.25::factA.
    0.7::factB.
    1.0::factC.
    
  
    %hop2
    conclusion:-and(factA,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Gertrude is a sheep and Sumit is thirsty'.