Evidence, in its broadest sense, includes all the means by which any alleged matter of fact, the truth of which is submitted for investigation, is established or disproved. It embraces every matter of fact, the effect, tendency or design of which, when presented, is to impress upon the mind a just conviction of the truth or falsehood of any substantive proposition which is affirmed on the one side and denied on the other.

In order to be received by a court, the evidence submitted must be competent, relevant and material.