That's one of the first things you learn in grad school - when in doubt attack the method.
While attacking the method is sometimes purely done as "attack", that doesn't mean the method is never deserving of attack.
All tigers are cats, but not all cats are tigers.
And again. Frankly. I find it humorous how much "research" is OBVIOUSLY the result of someone doing "research" to affirm their previously held conclusions. I mean let's face it. Sometimes the subject matter alone is a give away. IE, there are some new research items that hit the press where you immediately KNOW the person who researched that particular subject already had a strong opinion on it.
WHen that happens, you REALLY need to look close at what they did and did not do during the research. Frankly, the Social "Sciences" are the frickING WORST in this department.