context: It is probably not the case that Greg is a rhino. It is improbable that John moved to the office. It is highly likely that Jeff went to the bedroom.
hypothesis: It is certain that 'Jeff went to the bedroom and Greg is a rhino'.
valid_hypothesis: It is unlikely that 'Jeff went to the bedroom and Greg is a rhino'.
invalid_hypothesis: It is certain that 'Jeff went to the bedroom and Greg is a rhino'.
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.
    0.1::factB.
    0.9::factC.
    
  
    %hop2
    conclusion:-and(factC,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Jeff went to the bedroom and Greg is a rhino'.