This article examines how the political manipulation of Covid-19 statistics was opposed in 2020. It does this by studying in detail the language used in a public exchange of letters in the UK. The exchange was between the chair of the United Kingdom Statistics Authority (UKSA), a statutory body to prevent statistical malpractice, and the Minister of Health, who had been manipulating Covid statistics. The exchange reflects the greater power of the government minister. Initially, the UKSA chair used diplomatic language, marked by paratactic constructions, unspecified arguments, and impersonal structures that did not threaten the minister's face. The minister ignored these and the UKSA chair had to go beyond diplomatic language by re-specifying his arguments and upgrading his critical terminology. Only by catching the press's attention did the chair succeed in making the minister rectify, at least partially, the manipulated statistics. Implications for understanding today's political values are discussed. (Opposing statistical manipulation, manipulating Covid statistics, diplomatic language, parataxis and hypotaxis)