context: It is improbable that Mary got the football. Chances are about even that Daniel left the apple. It is probably the case that Jeff went to the bedroom.
hypothesis: It is probably not the case that 'Daniel left the apple' or 'Jeff went to the bedroom' or both.
valid_hypothesis: There is a very good chance that 'Daniel left the apple' or 'Jeff went to the bedroom' or both.
invalid_hypothesis: It is probably not the case that 'Daniel left the apple' or 'Jeff went to the bedroom' 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
    0.1::factA.
    0.5::factB.
    0.7::factC.
    
  
    %hop2
    conclusion:-or(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Daniel left the apple' or 'Jeff went to the bedroom' or both.