" 10. In Mohanlal Shamji Soni v. Union of India [Mohanlal Shamji Soni v. Union of India, 1991 Supp (1) SCC 271 : 1991 SCC (Cri) 595 : AIR 1991 SC 1346] this Court examined the scope of Section 311 CrPC, and held that it is a cardinal rule of the law of evidence, that the best available evidence must be brought before the court to prove a fact, or a point in issue. However, the court is under an obligation to discharge its statutory functions, whether discretionary or obligatory, according to law and hence ensure that justice is done. The court has a duty to determine the truth, and to render a just decision. The same is also the object of Section 311 CrPC, wherein the court may exercise its discretionary authority at any stage of the enquiry, trial or other proceedings, to summon any person as a witness though not yet summoned as a witness, or to recall or re-examine any person, though not yet summoned as a witness, who are expected to be able to throw light upon the matter in dispute, because if the judgments happen to be rendered on an inchoate, inconclusive and speculative presentation of facts, the ends of justice would be defeated.