Gell-Mann amnesia is Michael Crichton's rather arbitrary name for a very specific cognitive bias. Namely, he noticed (and discussed with Murray Gell-Mann, hence the name) that when he was reading the news, he was often very critical about articles in areas he understood well, and uncritical about areas he knew little about. This gave him reason to believe that he was probably being frequently misled when reading outside his area of interest.
"Briefly stated, the Gell-Mann Amnesia effect is as follows. You open the newspaper to an article on some subject you know well. In Murray's case, physics. In mine, show business. You read the article and see the journalist has absolutely no understanding of either the facts or the issues. Often, the article is so wrong it actually presents the story backward -- reversing cause and effect. I call these the "wet streets cause rain" stories. Paper's full of them.
In any case, you read with exasperation or amusement the multiple errors