G. Greenwald is addicted to arguing, isn't he?

[JDPriestly]

21. He is a lawyer. What do you expect? It's his job to argue. It's his job to think.

Socratic method:

Socratic method (also known as method of elenchus, elenctic method, or Socratic debate), named after the classical Greek philosopher Socrates, is a form of inquiry and discussion between individuals, based on asking and answering questions to stimulate critical thinking and to illuminate ideas. It is a dialectical method, often involving a discussion in which the defense of one point of view is questioned; one participant may lead another to contradict himself in some way, thus strengthening the inquirer's own point.

The Socratic method is a negative method of hypothesis elimination, in that better hypotheses are found by steadily identifying and eliminating those that lead to contradictions. The Socratic method searches for general, commonly held truths that shape opinion, and scrutinizes them to determine their consistency with other beliefs. The basic form is a series of questions formulated as tests of logic and fact intended to help a person or group discover their beliefs about some topic, exploring the definitions or logoi (singular logos), seeking to characterize the general characteristics shared by various particular instances. The extent to which this method is employed to bring out definitions implicit in the interlocutors' beliefs, or to help them further their understanding, is called the method of maieutics. Aristotle attributed to Socrates the discovery of the method of definition and induction, which he regarded as the essence of the scientific method.

In the second half of the 5th century BC, sophists were teachers who specialized in using the tools of philosophy and rhetoric to entertain or impress or persuade an audience to accept the speaker's point of view. Socrates promoted an alternative method of teaching which came to be called the Socratic method.

http://en.wikipedia.org/wiki/Socratic_method

The Socratic method is often used to teach law because it helps the student learn to argue both sides of a question. Glenn Greenwald is a lawyer so of course he is argumentative.