154(1). But if the child passes this preliminary test, then the court must proceed to the next test as to whether, in the opinion of the court, the child is able to understand the nature and implication of an oath. (3) If after passing the first test, he fails this second test, then being a competent witness, he will give evidence which is admissible under section 182(2), though not on oath. If, on the other hand, he passes the second test so that, in the opinion of the court, he understands the nature of an oath, he will give evidence on oath." Per LOKULO-SODIPE,J.C.A. (Pp.36-38,paras.D-A) (...read in context) 3. EVIDENCE - CONFESSIONAL STATEMENT OF AN ACCUSED PERSON: Whether a free and voluntary confessional statement of the accused person will be sufficient enough to sustain a conviction "The law is no longer recondite, but well settled that a conviction can be grounded and sustained on a free and voluntary confessional statement made by an accused person. This is so, because a confessional statement is the strongest evidence against the maker thereof. Usman Kaza v. The State (2008) 2 SCNJ 375 at 423; Arogundade v. The State (2009) 2 SCNJ 44 at 49 - 50; Ilodigwe v. The State (2012) 18 NWLR (pt. 1331) 1 at 29 - 30. And where an accused person resiles from admitting the making of the confessional statement, it is better and expedient that some bit of evidence as corroboration, outside the confession be found in support of the confessional statement. Golden Dibie & Ors. v. The State (2007) 3SCNJ 1 60 at 183; Demo Oseni v. The State (2012) 2 SCNJ (pt. 1) 215 at 246; Federal Republic of Nigeria v. Faith Iweka (2011) 12 SCNJ 783; Osuagwu v. The State (2013) 1 SCNJ 33 at 57." Per YAKUBU,J.C.A. (P.29,paras.B-F) (...read in context) 4. COURT - COURT DECISIONS: The essence and importance of court decisions "Courts do not give decisions for the fun of it. Decisions in cases, aside from binding parties thereto as well as their privies, are also to guide other persons who might find themselves in similar circumstances as the parties in any given decided case." Per LOKULO-SODIPE, J.C.A. (P.38,paras.E-F) (...read in context) 5. CRIMINAL LAW AND PROCEDURE - DEFENCE OF INSANITY: The need to critically examine the defence of insanity in our courts "Furthermore his Lordship, Aniagolu JSC succinctly re-echored the law that, "It is essential, from social and public stand point, to closely examine a defence of insanity. It is necessary to recognize that there