> Just looking at the scatter plot by itself doesn't tell you anything about the underlying data. Well if that were the case it would be perfectly pointless to

> Just looking at the scatter plot by itself doesn't tell you anything about the underlying data. Well if that were the case it would be perfectly pointless to make such a visualization... The goal of dimensionality reduction is to provide a useful summarization of the data; it is a valid question to ask to what degree it is successful at that.