The phrase "real deniers" refers to people who strongly refuse to accept or acknowledge something that is widely proven or accepted as true. Full definition
and, btw, as far as «deniers» are concerned, the only real deniers are those who speak of «sustainable» growth, which is an oxymoron. (dotearth.blogs.nytimes.com)
1) We climate realists deny no science, you peddlers of CatastrophicAGW - by - CO2 are the real deniers, of the science and empirical data which shows natural climate change. (cfact.org)
The real deniers keep trying to repair the infamous climate hockey stick. (drtimball.com)