Proof of global warming ... Means exactly what?

This blog is all about aking basic questions and attempting to answer them "scientifically" which is to say that it stands for logical, clear thinking, of which there is a dearth.

I wrote a post several years ago about the science of climate forcing, and since then the topic of climate change has come to the boil. I'd say that my position in the great climate debate is that of an agnostic, a fence-sitter if you like.

Here's a basic question for you to comment on here, but please note that it  must be answered in a cool and scientific fashion -- or else I might exercise my prerogative (as owner of this blog) and delete your posts, since I intensely dislike abusiveness, sloppy thinking, misquoting, and all such negativism.

THE BASIC QUESTION IS ...
Regarding GCC (global climate change) or if you like AGW (anthropogenic global warming), and NOT being concerned with localized weather changes -- and apart from any disagreements about whether the climate actually is warming or cooling, but supposing that it IS warming:

Does proof of global warming amount to proof of man made warming? Is it being unscientific and illogical to claim that it does?

There are some subsidiary basic questions, too, such as: Is it all too big for us to stop, anyway? Doubtless your answers will bring up matters like this!