per Nimpar, JCA in Adepoju v. State (2014) LPELR-23312(CA), Intention generally is incapable of positive proof because it is a matter of inference of supporting circumstances of every given case … There is a legal aphorism that even the devil himself does not know the intention of man. Thus, intention is inferred from overt acts. Where there is a confession from the accused and surrounding circumstances of a case, intention can be discovered there from. The actions of the accused provides the basis for concluding on the intention. The significance of intention in a criminal trial is that intention is the purpose or design of the act performed coupled with the desire to do the act. The intention here is evident from the surrounding circumstances.
MEANING OF INTENTIONAL AND INTENTION
One may ask: what is “intention” from which the word “intentional” is derived? Intention is the purpose or design with which an act is performed. It is the foreknowledge of the act coupled with the desire to do the act. The foreknowledge and desire form the cause of the act in so far as they fulfil themselves through the operation of the will. An act is intentional if, and in so far as it exists in idea before it exists in the realm of facts; the idea realising itself in the fact because of the desire by which it is accompanied. See Advanced Law Lexicon, 3rd Edition Reprint 2009, page 2394.
— N.S. Ngwuta, JSC. Henry Nwokearu V. The State (SC.227/2011, 24 MAY 2013)