text: I understood it that Jana had asked Josie to thin her paint and Josie wouldn't do so and argued with her. It was supposed to be a lesson, but I don't think Jana was actually putting down her ability, just her obedience. Maybe I misunderstood.
  So I haven't seen the episode yet, but it says above that Josie covered her whole paper in blue paint. Sounds like she could have just been wasting paint? Or not following instructions? You say not to compare her artwork with her sisters, but it doesn't sound like she was even trying.