Facts not otherwise relevant are relevant -

(1)

if they are inconsistent with any fact in issue or relevant fact;

(2)

if by themselves or in connection with other facts they make the existence or non-existence of any fact in issue or relevant fact highly probable or improbable.

Illustrations

(a) The question is, whether A committed a crime at Calcutta on a certain day.

(b) The question is, whether A committed a crime.