Atolagbe v. Shorun (1985) 1 NWLR (Pt. 2) 360 at 365 where Coker, J.S.C. in dealing with the main function of pleadings in the trial of an action had this to say: – “The primary function of pleadings is to define and delimit with clarity and precision the real matters in controversy between the parties upon which they can prepare and present their respective cases and upon which the court will be called to adjudicate between them. It is designed to bring the parties to an issue on which alone the court will adjudicate between them party is bound by his pleading and cannot go outside it to lead evidence or rely on facts which are extraneous to those pleaded.”
COURTS ARE BOUND TO DECIDE CASES ON THE PLEADINGS
The foregoing is the gist of the simple case presented before the trial judge. But it was made very complicated by the introduction of legal technicalities at the hearing of the appeal in this Court. The matter was further compounded by the conduct of the parties in that neither, as was disclosed by the issues canvassed before us, had any respect for the truth. However, courts are bound to decide cases on the pleadings of the parties and admissible evidence.
— M. Bello, JSC. Salawu Ajide V. Kadiri Kelani (SC.76/1984, 29 Nov 1985)