Read This Introduction!

ALL of what is presented to you in the Chapters that follow is guided by three important precepts: (1) ‘objective evidence’, (2) ‘beyond reasonable doubt’ proof, and (3) ‘on the balance of probabilities’ proof.

‘Objective Evidence’:  information based on facts that can be proved through analysis, measurement, observation, and other such means of research.
(Ref: www.businessdictioany.com)

‘Beyond Reasonable Doubt’ proof:  proof on the basis of evidence of such a convincing character that a reasonable man would not hesitate to act upon it in the most important of his own affairs. There must be no other logical explanation that can be derived from the facts except that the defendant committed the crime. IF the jurors or judge have no doubt as to the defendant's guilt, or if their only doubts are unreasonable doubts, THEN the prosecutor has proven the defendant's guilt beyond a reasonable doubt. This is the burden of proof required in criminal law cases.
(Ref: www.thefreedictionary.com)

‘On the Balance of Probabilities’ proof:  proof supported by the weight of evidence, i.e. one side has more evidence in its favour than the other. This is the burden of proof required in civil law cases.
(Ref: www.thefreedictionary.com)