This is a subjective self-assessment, not an objective fact that can be publicly verified. The interview page shows Farage saying he "still could" make a case for religious faith and also that Christian values matter, but the same interview says he was "pretty much a non-believer" by age 18, which shows his beliefs were mixed rather than proving anything about his current ability to argue for faith. A later interview reported that he described himself as a "lapsed" Anglican who does not attend church regularly but believes in God, which again suggests personal religious views, not verifiable proof of argumentative ability. Sources: High Profiles interview with Nigel Farage (https://highprofiles.info/interview/nigel-farage/); The Independent, "Nigel Farage on HIV: Ukip leader says 'sensible Christian thing' is to put British patients first" (https://www.independent.co.uk/news/uk/politics/nigel-farage-on-hiv-ukip-leader-says-sensible-christian-thing-is-to-put-british-patients-first-a109746.html).