There is nothing too ridiculous for people to state in complete seriousness. WebHubTelescope provides an example:
Increase of greenhouse gases by 87%?
Co2 only has increased by 40%. Notice how Manacker has to stand up for a fellow skeptic no matter how ridiculous his claim is.
Look at the first two sentences here. The direct implication is CO2 is the only relevant greenhouse gas. That’s obviously untrue, but it’s also not specifically stated.
The real problem is WebHubTelescope dismisses manacker’s claim out-of-hand (and rhetorically based on that untrue implication) despite the fact manacker provided the exact way in which he calculated it. Incidentally, I actually did an almost identical calculation elsewhere on this page (I did it first manacker!) for the same basic reason as manacker. It was an obvious test to try, and it was perfectly valid.
Despite this, WebHubTelescope simply hand-waves it away while making snide remarks (actually only one of them). Hoorah for meaningful discussions people refuse to have.