Yet, despite the growing mountains of evidence showing MSM bias, using this as proof for an information cartel driving a liberal bias (or any bias) in the MSM still does not pile higher than a hill of beans. On the contrary, this overwhelming evidence is actually doing a better job of proving the the opposite: that there is no systemic bias in the MSM. To make my point, let's play with marbles.
Alice and I decide to toss a marble in a bucket for every MSM news story we see. The color of the marble we toss represents our interpretation of the story's political bias with red for conservative, blue for liberal and purple for politically neutral. I am a known card-carrying liberal and Alice sleeps in Reagan jammies. Not surprisingly, a month later, her bucket is filled with 50% blue marbles, 45% purple marbles and 5% red marbles. She looks at my bucket and quips, "Still wearing your Trotsky PJs, I see," and notes that it contains 50% red marbles, 45% purple marbles and 5% blue marbles. So we thoroughly mix our respective buckets together in a tub, take a few steps back and, guess what? The tub appears to be filled with purple marbles.
If only two people play the game, it is reasonable to assume that one player is less objective than the other and, thus, skews the merged results. When lots and lots of people are collecting samples of media bias, the quantitative integrity of the sample collection matters less and less because it is also reasonable to assume that this lack of integrity distributes equally across the political spectrum. Since the errors will tend to distribute evenly across the political spectrum, then the results will still produce the same mean. Translation: still no systemic MSM bias being shown.
A news report deemed false (whether real or imagined) is the most popular indictment of the MSM bias but is far from the only argument being used. There are myriads of studies using methods such as relativistically ranking how conservative or liberal a news organization is deemed. Other studies have surveyed editors and journalists about their political beliefs. Still others count the frequency of liberal versus conservative sourcing, or possibly, the frequency of the reporting of a politically charged event.