Consciousness: freaky shit or nbd

enjoyed that Peter Watts talk, however terrifying

Good, sceptical, pessimistic piece about understanding the brain in general:

https://www.theguardian.com/science/2020/feb/27/why-your-brain-is-not-a-computer-neuroscience-neural-networks-consciousness

Reverse engineering a computer is often used as a thought experiment to show how, in principle, we might understand the brain. Inevitably, these thought experiments are successful, encouraging us to pursue this way of understanding the squishy organs in our heads. But in 2017, a pair of neuroscientists decided to actually do the experiment on a real computer chip, which had a real logic and real components with clearly designed functions. Things did not go as expected. [...] Eric Jonas and Konrad Paul Kording – employed the very techniques they normally used to analyse the brain and applied them to the MOS 6507 processor found in [the Atari 2600] [...] As Jonas and Kording put it, the techniques fell short of producing "a meaningful understanding"

That’s an awesome paper, they do recordings and try to correlate the activity with what’s happening onscreen in Donkey Kong

https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1005268

The Visual6502 team reverse-engineered the 6507 from physical integrated circuits [11] by chemically removing the epoxy layer and imaging the silicon die with a light microscope. Much like with current connectomics work [12, 13], a combination of algorithmic and human-based approaches were used to label regions, identify circuit structures, and ultimately produce a transistor-accurate netlist (a full connectome) for this processor consisting of 3510 enhancement-mode transistors. Several other support chips, including the Television Interface Adaptor (TIA) were also reverse-engineered and a cycle-accurate simulator was written that can simulate the voltage on every wire and the state of every transistor. The reconstruction has sufficient fidelity to run a variety of classic video games

I find this pretty amazing in itself!

They’ve done that with a few CPUs outside of this context - I think there is an online Intel 4004 simulator showing voltage changes on every line as it runs.

Ledge that Guardian book excerpt is so fucking otm, thank you for linking it