It is a settled principle of law that where an adversary or a witness called by him testifies on a material fact in controversy in a case, the other party should, if he does not accept the witness’s testimony as true, cross-examine him on that fact, or at least show that the he does not accept the evidence as true, where, as in this case, he fails to do either, a court can take his silence as an acceptance that the party does not dispute the facts.
– Nnaemeka-Agu JSC. Amadi v. Nwosu (1992)