context: There is little chance that Mary dropped the apple. It is highly likely that John went to the hallway. We doubt that Lily is green.
hypothesis: There is a very good chance that 'Mary dropped the apple' or 'Lily is green' or both.
valid_hypothesis: It is probably not the case that 'Mary dropped the apple' or 'Lily is green' or both.
invalid_hypothesis: There is a very good chance that 'Mary dropped the apple' or 'Lily is green' 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.
    0.9::factB.
    0.2::factC.
    
  
    %hop2
    conclusion:-or(factA,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Mary dropped the apple' or 'Lily is green' or both.