First, the author said that the woman's dress looked like a servant's dress which was in contrast with her luxurious fur collar but the lecturer said that recent investigations with X-Ray analysis have shown that the fur collar has been added hundred years after the original painting by someone else in order to increase its value.
Second, it is said in the reading part that illuminated face of the woman did not match with the dark fur collar which would absorb the light rather than reflecting it. However, speaker believed that woman's light color clothes without that dark fur in original painting