That&#x27;s the job of the defense, who&#x27;s trained and has done the research. It&#x27;s their job to call bullshit on the prosecution in your presence.<p>So you have two sides who are trained and have (hopefully!) done the research i.e, the facts of the case. Provided they have (and the judge can and will throw out cases where this hasn&#x27;t been done), then the judge will instruct on the points of law being decided here, which the jury will then decide on.<p>It&#x27;s far from perfect, because people aren&#x27;t perfect. But it&#x27;s a degree better than the State simply deciding your guilt.<p>Sometimes the parties show up with half a case, the jury can&#x27;t agree, and the foreman throws up their hands and says &quot;This is all bollocks&quot;, and everyone goes home. Which is what happened in the article.