"A finding of guilt is not to be reached simply by rejecting the case put forward by the defendant. There cannot be a guilty verdict unless the court of trial accepts, that is actually and positively believes to the required standard, the evidence presented by the prosecution on matters critical to proof of guilt. When a defendant gives exculpatory evidence, and it is trite to say that he or she need not do so, the question is not so much whether it is to be preferred to the prosecution evidence but whether in the light of it the prosecution has proved its case. Even if the Court does not positively believe the defendant's evidence and in that sense does not prefer it, the question remains whether on the whole of the evidence the guilt of the defendant has been proved beyond a reasonable doubt. This is not a mere exercise in semantics. There is always a real possibility that whilst the evidence of the prosecution witnesses may be generally preferred to that of the defence witnesses, the evidence as a whole still leaves a reasonable doubt as to the guilt of the defendant. For example, a defendant may give an account which sounds implausible and unlikely, yet the Court may be unable to rule it out. The defendant may not go into evidence at all, yet the prosecution evidence may fail to satisfy the Court to the required degree."