Prof Nyong'o defended the President saying that Kenyatta did not intend to embarrass the country but used a figurative technique in English called hyperbole to pass his message.
He went ahead to explain that the Head of State used histrionic hyperbole, which is an excessive use of exaggerated statements to communicate something that should not be taken literally.
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President Kenyatta was criticised for saying that Kenyans had specialised in stealing when he addressed Kenyan students during his recent tour of Israel.
"God has given Kenyans a country that is 20 times better than the one we are in right now. But we are experts at stealing, abusing each other, doing other evils and perpetuating tribalism," he said.
The learned Kisumu Senator countered Kenyatta's critics in the Senate, adding that Winston Churchill - former British Prime Minister - was famous for the use of the same figurative language.
Professor Nyong'o's argument prompted Acting Speaker, Wilfred Machage, to take sometime and allow the 'school of thought' to sink.
"When wise men like Prof Anyang' Nyong'o give guidance, the rest should take pride in it," he said while drawing the debate to a close.