terminological inexactitude

I was taught at Cambridge University that though one could not say something such as “Mr. so-and-so is a liar,” it was permissible to say, “the Right Honorable so-and-so is guilty of a ‘terminological inexactitude.’”

Unfortunately, so desperate is our beleaguered prime minister that he recently committed a classic "terminological inexactitude" by proclaiming in a party political broadcast that the government was paying down the debt when it manifestly was not.

Who used the phrase "terminological inexactitude" to mean "lie", to get around rules on unparliamentary language?

Normally open and candid persons are found concealing the paper against a later and freer hour; terminological inexactitude is even resorted to in order to cover such jackdaw-hoardings; glances become covetous and suspicious.

He said: 'The right honorable gentleman committed a terminological inexactitude.'