>a lot of people argue the recent Apple v. Samsung ruling was invalid precisely because the foreman was an 'expert'.
Not so much that he was an expert, but he thought he had relevant expertise, made a false presumption about the nature of the law based on that misunderstanding (namely, that because object files would not run without recompilation between the iPhone and instances of prior art produced by Samsung, it didn't count as "real" prior art), and convinced the rest of the jury to deliver a guilty verdict based on whether the processor could execute the same object code or not, not whether the presented evidence actually was sufficient "prior art", meaning a demonstration that the invention was not unique enough at the time to warrant protection, to invalidate Apple's patent.
The point is, he brought his 'prior knowledge', which is expressly forbidden in the jury instructions. The parent basically proposed that every jury be made up of people like this.
Not so much that he was an expert, but he thought he had relevant expertise, made a false presumption about the nature of the law based on that misunderstanding (namely, that because object files would not run without recompilation between the iPhone and instances of prior art produced by Samsung, it didn't count as "real" prior art), and convinced the rest of the jury to deliver a guilty verdict based on whether the processor could execute the same object code or not, not whether the presented evidence actually was sufficient "prior art", meaning a demonstration that the invention was not unique enough at the time to warrant protection, to invalidate Apple's patent.
http://www.groklaw.net/article.php?story=20120828225612963