context: There is a better than even chance that Lily is green. There is almost no chance that Gertrude is a cat. It is probably not the case that Emily is a mouse.
hypothesis: There is little chance that 'Lily is green and Emily is a mouse'.
valid_hypothesis: There is little chance that 'Lily is green and Emily is a mouse'.
invalid_hypothesis: There is a better than even chance that 'Lily is green and Emily is a mouse'.
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
    0.6::factA.
    0.02::factB.
    0.25::factC.
    
  
    %hop2
    conclusion:-and(factA,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Lily is green and Emily is a mouse'.