Haha...what a bunch of pseudo-scientific nonsense in this thread. Sorry boys, your new pet mathematician in the OP is a few decades late to the party. The idea of "global temps as a random walk" was debunked and discarded long ago.
I don't think you understand the concept of pareidolia, and how it has been used to promote the Grand Cause of global warming.
The OP is not saying that it is not happening, but simply pointing out the statistical insufficiency of determining the cause, or even its existence.
Climate science seems quite happy to allow extreme conclusions to be drawn from flimsy evidence. They should be scientists not advocates.