I also agree that the article poses useful questions that need answers. However, in this case I think it is extremely important that we get real answers, and do

I also agree that the article poses useful questions that need answers. However, in this case I think it is extremely important that we get real answers, and don't allow ourselves to be swayed by ad-hominem or other specious arguments. Greenwald may be a flake, and it is one unknown's word against that of many public and powerful people... but lets not let that stop us demanding those answers. These allegations are very serious and if by any remote chance they were true, those powerful people would be busy trying to make Greenwald look like a flake and Snowden like a confused tech incompetent.