Evidence given by a witness in another case may be used to impeach his credit if, in the later case, he says something different; but what he said in the earlier case does not become evidence in the later case. And a judgment given in another case can, in appropriate cases, be put in a later suit, to prevent the re-opening of the same question. One hopes that the indiscriminate introduction of other proceedings into a trial will be discontinued.
— Bairamian, F.J. Owonyin v. Omotosho (1961) – F.S.C.249/1960