[FeepingCreature]

We do know that human consciousness has something to do with the networks of neurons in our brains. We know this because we can poke specific parts of it and manipulate specific aspects of our consciousness: we can observe a fairly direct correspondence between conscious experience and biological substrate.

[eszed]

To play devil's advocate: have a look at the way plants in a forest communicate with each other - even across different species! That's a complex network, in which individual plants could be analogized to neurons.

Do I think forests are conscious in the same way that we are? No. I do think "consciousness" is not a binary, and that we have poor tools and insufficiently-developed models for understanding it.