Opinions of experts
The opinions run opens: when the Court must judge a specialist point — science, foreign law, handwriting, fingerprints, or any field — the opinion of a person specially skilled is relevant. So too the Examiner of Electronic Evidence on digital matters.
How to read Section 39
Borrowed knowledge, relevant — not binding.
Foreign law, science, art, any field, handwriting, fingerprints — and (sub-2) electronic evidence.
A person specially skilled in that field — an expert; for e-records, the Examiner of Electronic Evidence.
The opinion is relevant — evidence to weigh, but the Court is not bound by it.
The bare Act
The section in its own words — colour-keyed by what each phrase does.
(1) When the Court has to form an opinion upon a point of foreign law or of science or art, or any other field, or as to identity of handwriting or finger impressions, the opinions upon that point of persons specially skilled in such foreign law, science or art, or any other field, or in questions as to identity of handwriting or finger impressions are relevant facts and such persons are called experts.
(a) The question is, whether the death of A was caused by poison. The opinions of experts as to the symptoms produced by the poison by which A is supposed to have died, are relevant.
(b) The question is, whether A, at the time of doing a certain act, was, by reason of unsoundness of mind, incapable of knowing the nature of the act, or that he was doing what was either wrong or contrary to law. The opinions of experts upon the question whether the symptoms exhibited by A commonly show unsoundness of mind, and whether such unsoundness of mind usually renders persons incapable of knowing the nature of the acts which they do, or of knowing that what they do is either wrong or contrary to law, are relevant.
(c) The question is, whether a certain document was written by A. Another document is produced which is proved or admitted to have been written by A. The opinions of experts on the question whether the two documents were written by the same person or by different persons, are relevant.
(2) When in a proceeding, the court has to form an opinion on any matter relating to any information transmitted or stored in any computer resource or any other electronic or digital form, the opinion of the Examiner of Electronic Evidence referred to in section 79A of the Information Technology Act, 2000 (21 of 2000), is a relevant fact.
In short: some questions need knowledge the Court does not have — medicine, foreign law, handwriting, computers. The law lets a specially skilled person give an opinion on that narrow point, and calls him an expert. The 2023 Act widens the fields to “any other field” and names the Examiner of Electronic Evidence for digital matters.
→ This carries forward IEA 1872 §§ 45 and 45A — the opening of the “opinions of third persons” run.
Glossary
A person specially skilled in a field whose opinion on a point in it the law makes relevant.
Having real, above-ordinary knowledge or skill in the field — by study, training or experience.
The 2023 widening — expert opinion is no longer confined to the old list of foreign law / science / art / handwriting / prints.
Fingerprints — a classic field for expert identification.
An expert notified under § 79A of the IT Act, 2000 — for opinions on electronic/digital information.
An expert’s opinion is evidence to weigh — the Court decides; it is not bound to accept it.
The picture
The Court borrows the knowledge it lacks.
The section, part by part
Tap a part — the picture-story tells it first; the word-by-word text and example follow.
the ruleWhen the Court borrows expert knowledge
the electronic-evidence expertThe digital counterpart
the illustrationsPoison, the mind, and handwriting
Connected provisions
Foreign law in law books
Foreign law can be proved by official law books (§ 32) — or by an expert in it under § 39.
Section 79A
The provision that notifies the Examiner of Electronic Evidence — the expert of § 39(2).
Facts bearing on expert opinions
The next of the opinion-relevancy provisions in Chapter II.
IEA 1872, §§ 45 & 45A
Carried forward — expert opinion, now including the electronic-evidence Examiner.
