You are a juror in a criminal case.  The D.A. calls as witnesses two police officers, whose testimony is completely at odds with each other on numerous points material to the defendant’s guilt.  The sign-post up ahead reads, for that reason alone: REASONABLE DOUBT.  You have just entered the “ACQUITTAL ZONE”.  When you do not have “an abiding conviction in the truth of the charges,” which you cannot if the police do not agree, you MUST ACQUIT.