Not sure its the law the judge wants people ignorant about but rather evidence. Something gets suppressed thats crucial over a technicality and they’re afraid a juror will find out. They hate when people know all the facts.
Bingo! I was called for jury duty on a major drug bust case.
I didn't realize when asked if I had any prior knowledge of the case before being picked for the jury, that I really did.
Once the trial got underway, I realized that it was the exact same case that my neighbor had been on that resulted in a hung jury. I had knowledge of all the real evidence in the case that was thrown out on phony technicalities.
I was about to alert the judge of my mistake, when the entire freaking case was thrown out because the last tiny shred of evidence was thrown out!