How I understand the article, is that they understand why others act in certain ways, they know the mechanism of empathy, but nothing here confirms that they are empathetic themselves. I think this article's conclusion is misleading.
There are many different definitions of what empathy means or how it “feels”. Do you (literally) feel the pain you’re inflicting on somebody else, do you know about it cognitively but not feel it, and how does any of it influence your actions.
