Relevancy and weight are in quite distinct compartments in our law of evidence. They convey two separate meanings in our adjectival law and not in any form of dovetail. In the order of human action or activity, in the area of the law of evidence, relevancy comes before weight. Relevancy, which propels admissibility, is invoked by the trial Judge immediately the document is tendered. At that stage, the Judge applies sections 6, 7, 8 and other relevant provisions of the Evidence Act to determine the relevance or otherwise of the document tendered. If the document is relevant, the Judge admits it, if all other aspects of our adjectival law are in favour of such admission. If the document is irrelevant, it is rejected with little or no ado. Weight comes in after the document has been admitted. This is at the stage of writing the judgment or ruling as the case may be. At that stage the Judge is involved in the evaluation or the evidence vis-a-vis the document admitted. While logic is the determinant of admissibility and relevancy, weight is a matter of law with some taint of facts.
— N. Tobi JSC. Musa Abubakar v. E.I. Chuks (SC.184/2003, 14 DEC 2007)