That's something juries do in every case. Assess the credibility of witnesses on a sliding scale and apply the reasonable doubt standard in criminal cases. Trials are an adversarial setting. It is by design. And every case has some good points by both the prosecution and the defense. The jury's job is to assess all of that. Work through the facts and follow the law.
Well majority of this jury has their mind made up and WANT to believe cohen. Sort of an issue if you would ever be honest.