I can't stand with the unquestioned use of "understanding" here and there - did the author give a more precise definition of that? (I couldn't find any in the p

I can't stand with the unquestioned use of "understanding" here and there - did the author give a more precise definition of that? (I couldn't find any in the paper.) It reads more like a ranty blog piece than an academic article. It's sad that some people will read this and get confused.