You seem to be arguing against things I never said. Of course we can't dismiss solar forcing, it has a major influence on the system. But you want to reduce everything to it. Humans also aren't solely responsible for a great deal of historical climate change (many other natural factors are at play, some of which I mentioned before). However, if we rely on "the known" as you prefer, like basic chemistry and physics of energy transfer, we can predict the effects of dumping a crap load of carbon dioxide into the atmosphere (capturing more energy, i.e. heating the atmosphere, on average). You accuse me of oversimplifying things, yet that's what you're doing. You accuse me of being an armchair commentator that hasn't studied enough, yet why do I have the feeling that it is you who are basing your beliefs solely on internet articles and hearsay?