How we cite our quotes: All quotations are from 12 Angry Men.
Quote #1
JUDGE: It's now your duty to sit down and try and separate the facts from the fancy.
Just before the jurors retreat to their jury room, the judge reminds them that they have a very important responsibility to get past their versions of reality and to come up with the version that makes most sense. That's the whole point of having twelve jurors instead of one, since twelve jurors are more likely to come to a more objective version of reality.
Quote #2
JUROR #10: Look, we're all grown-ups in here. We heard the facts didn't we? You're not gonna tell me we're supposed to believe this kid, knowing what he is.
We can tell early on that Juror #10 has a strong bias against the defendant because the defendant is non-white. This claim also shows us that rather than being totally objective, this juror is more than willing to indulge his petty racism, even if it ends up getting the defendant electrocuted.
Quote #3
JUROR #3: Here's what I think. And I have no personal feelings about this. I just wanna talk about facts.
We know that the whole "I have no personal feelings" is a bunch of hooey, since it's impossible for any one person to claim they're totally objective about something. Juror #3 says he just wants to talk about facts, but we learn at the end of the movie that he's the most biased juror out of the entire bunch.