Facts, not otherwise relevant, are relevant if they support or are inconsistent with the opinion of experts when such opinions are relevant.
Illustrations
(a) The question is, whether A was poisoned by a certain poison.
The fact that other persons who were poisoned by that poison, exhibited certain symptoms which experts affirm or deny to be the symptoms of that poison, is relevant.
(b) The question is, whether an obstruction to a harbour is caused by a certain seawall.
The fact that other harbours similarly situated in other respects, but where there were no such sea-walls, began to be obstructed at about the same time is relevant.
COMMENTS
Admissibility
The science of identification of footprints is not a fully developed science and therefore if in a given case, evidence relating to the same is found satisfactory it may be used only to reinforce the conclusions as to the identity of a culprit already arrived at on the basis of other evidence; Mohd. Aman v. State of Rajasthan, (1997) 4 Supreme 635.