Also, some of what happens in the brain is just storytelling. Like, when the doctor hits your patellar tendon, just under your knee, with a reflex hammer. Your knee jerks, but the signals telling it to do that don't even make it to the brain. Instead the signal gets to your spinal cord and it "instructs" your knee muscles.

But, they've studied similar things and have found out that in many cases where the brain isn't involved in making a decision, the brain does make up a story that explains why you did something, to make it seem like it was a decision, not merely a reaction to stimulus.

[–] intensely_human@lemm.ee 1 points 7 months ago (1 children)

That seems like a lot of wasted energy, to produce that illusion. Doesn’t nature select out wasteful designs ruthlessly?

[–] wols@lemm.ee 5 points 7 months ago (1 children)

TLDR:
Nature can't simply select out consciousness because it emerges from hardware that is useful in other ways. The brain doesn't waste energy on consciousness, it uses energy for computation, which is useful in a myriad ways.

The usefulness of consciousness from an evolutionary fitness perspective is a tricky question to answer in general terms. An easy intuition might be to look at the utility of pain for the survival of an individual.

I personally think that, ultimately, consciousness is a byproduct of a complex brain. The evolutionary advantage is mainly given by other features enabled by said complexity (generally more sophisticated and adaptable behavior, social interactions, memory, communication, intentional environment manipulation, etc.) and consciousness basically gets a free ride on that already-useful brain.
Species with more complex brains have an easier time adapting to changes in their environment because their brains allow them to change their behavior much faster than random genetic mutations would. This opens up many new ecological niches that simpler organisms wouldn't be able to fill.

I don't think nature selects out waste. As long as a species is able to proliferate its genes, it can be as wasteful as it "wants". It only has to be fit enough, not as fit as possible. E.g. if there's enough energy available to sustain a complex brain, there's no pressure to make it more economical by simplifying its function. (And there are many pressures that can be reacted to without mutation when you have a complex brain, so I would guess that, on the whole, evolution in the direction of simpler brains requires stronger pressures than other adaptations)

[–] merc@sh.itjust.works 2 points 7 months ago

Yeah. This is related to supernatural beliefs. If the grass moves it might just be a gust of wind, or it might be a snake. Even if snakes are rare, it's better to be safe than sorry. But, that eventually leads to assuming that the drought is the result of an angry god, and not just some random natural phenomenon.

So, brains are hard-wired to look for causes, even inventing supernatural causes, because it helps avoid snakes.