http://www.insitelawmagazine.com/evidencech2.htm(1) THE MEANING OF EVIDENCE
Of the eight uses of the term "evidence" in ordinary parlance , only three are relevant in legal parlance. The first defines the term by presenting a complex picture and the importance of the context:
"The available facts, circumstances, etc. supporting or otherwise a belief, proposition, etc., or indicating whether or not a thing is true or valid."
This definition suggests that argument and evidence are interconnected. But there is a distinction between "an argument" and "evidence": An "argument" is the statement of reasons leading to a conclusion which involves an inference or a deduction whilst evidence is concerned with facts and proof of facts or statistical and experimental data. For example, a person found in possession of stolen goods soon after the theft is presumed to be either the thief or the receiver. But this is a stereotyped conclusion which could be displaced by testimony proving the accused's innocence. Furthermore, a belief is a personal matter since it is difficult for the non-believer to share the belief and as Wittgenstein reminds us: "It is clear that there are no grounds for believing that the simplest eventuality will in fact be realized.”
The second definition specifies the use to which evidence is put:
"Information, whether in the form of personal testimony, the language of documents, or the production of material objects, that is given in a legal investigation, to establish the fact or point in question."
The third definition describes what counts as evidence: "a document by means of which a fact is established". Historically, the third definition is very limited in scope since in civil and criminal proceedings we rely on more than just documentary evidence.
In legal parlance, therefore, textwriters have adopted variants of the second definition or a combination of the second and third definitions instantiated above. Cross defines evidence of a fact "as that which tends to prove it - something which may satisfy an inquirer of the fact's existence". Stephen's definition shows that there are precise requirements for the legal admissibility of evidentiary facts in a court of law. "Evidence", according to Stephen, means:
"(1) Statements made by witnesses in court under a legal sanction, in relation to matters of fact under inquiry;
such statements are called evidence;
(2) Documents produced for the inspection of the Court or judge;
such statements are called documentary evidence."
Adopting a position not too dissimilar to the second definition instantiated above, Twining opines:
"[E]vidence is the means of proving or disproving facts, or of testing the truth of allegations of fact, in situations in which the triers of fact have no first-hand knowledge of the events or situations about which they have to decide what happened ... 'evidence' is information from which further information is derived or inferred in a variety of contexts for a variety of purposes."
As the definitions proffered by Cross, Stephen and Twining are silent on the quality of fact or information offered, it is submitted that any material or fact which is sufficiently reliable and cogent (i.e. weighty) may be regarded as evidence.
AND SEVERAL MORE PARAGRAPHS