Evidentiary presumptions and definition of document determine admissibility and proof standards under the Sakshya Adhiniyam. The Adhiniyam defines document to include physical and electronic records, classifies evidence as oral and documentary (including electronic statements and records), and treats fact to cover sensory perceptions and mental states. It specifies facts in issue as those determining rights or liabilities, and sets standards for proof by distinguishing proved, not proved, and disproved, while authorising judicial may presume and shall presume mechanisms. Undefined terms adopt meanings from related statutes.