No, I do not make this stuff up. You can search the details yourself. Not all volcanic eruptions are strong enough to deposite ash throughout the globe yet still contribute to temperature change. It can also deposit other chemicals such as sulfuric acid.
I know that. Climate change brought about by volcanic activity isn't a contamination though. It's exactly the sort of thing scientists are looking for. It tells us what sorts of effects volcanic activity has on climate (generally a cooling one), and gives us a better record of the planet's Geologic history.
Yes, there are various sources but none are conclusive in giving an accurate prediction. We are experiencing a slight global temperature increase but not as astronomical as GW quacks believe.
I think we're experiencing exactly what the models predicted. They predicted an average increase of approximately 1.5 degrees warming and that's exactly what we got. And yes, all the sources are virtually in accord on what the temperature record shows. (notice again that I'm following your lead and not bothering with any sources or other such nonsense. But I can provide them if need be).
Hints do not equal causation, sorry.
I didn't say it did, I don't think. I said it gives us a damned good place to start our investigation. The fact that CO2 levels correspond so beautifully with temperatures isn't proof positive that they are connected, but you must admit it's a compelling reason to check and see if they are.
And it doesn't matter anyway. Global warming is a physics based theory, not a best fit to the data theory.
Obviously these scientists do not know by how much human activities/emissions contribute to GW compared with other sources. Otherwise their 1 to 6 degree Celsius prediction would not be such a large figure.
The figure has nothing to do with uncertainty in the physics of climate change. And they aren't predictions, they're projections based on a range of outcomes based on a variety of emissions scenarios. The only unknowns in these scenarios are what future anthropogenic emissions might be, as well as other semi-random factors like degree of volcanic activity and so forth. The higher end projections are based on higher emissions scenarios, and the lower are based on the lowest possible emissions scenario, with the middle range being the most likely.
Oh and by the way, let's stop chopping each other's paragraphs into tiny little bite sized pieces before we get too carried away OK? It's all fun and games at first but soon becomes annoyingly tedious to wade through.