Please give some proof of Varoufakis lying. I always check what he claims in his books and talks and I never spotted a lie. I also check Saul Griffith and Amory

Please give some proof of Varoufakis lying. I always check what he claims in his books and talks and I never spotted a lie. I also check Saul Griffith and Amory Lovins talks, books and papers on factual errors and never spotten one in two decades.