That which tends to prove the existence or non existence of some fact. Testimony and production of documents and things relating to the facts into which the court enquires and the methods and rules relating to the establishing of those facts before the court. That which, a court of justice is permitted by law to take into consideration for making clear or ascertaining the truth of the fact or point in issue. [Section 3 of the Evidence Act, 1872]

The established principle of law is that if part of the evidence of certain witnesses is disbelieved, the entire evidence is not liable to be discarded. [Nurul Islam vs. State (1988) 40 DLR 122]

Secondary evidence is not admissible in evidence unless there is proof of execution of the original and its subsequent loss or destruction. – the Contract Act, 1872 (Act IX of 1872), Section 65 [Abdur Razzak vs. Ahila Khatun and others, (HCD) 610]