An American journalist, who was tired of receiving complaints that Nigerians answer questions with another question decided to personally investigate the allegation.

The journalist got a Nigerian visiting visa, bought his flight ticket, and off he flew to Nigeria. He was prepared to stay as long as necessary in order to discover the fact.

When he got to the Nigerian airport, he was approached by an immigration officer whose duty it was to check the validity of entry visas and decide whether to deny or permit entry into Nigeria.

They got themselves into the following dialogue:

Immigration officer: What is the purpose of your visit, sir?

Journalist: I am here to investigate an allegation against Nigerians.

Immigration Officer: What is the allegation?

Journalist: Conventional wisdom is that Nigerians answer a question with another question. Is it true?

In response, the immigration office angered by what he felt was a calumny against his motherland answered angrily...WHO TOLD YOU THAT?

The journalist smugly and satisfactorily asked the immigration officer to return his passport stating that Thank you but, I do not want an entry permit anymore.