David Galbraith Profile picture
Jun 9, 2020 8 tweets 2 min read Read on X
.@stephen_wolfram theory not everything, so far:
> The universe is a computer
> As in its operation creates itself
> From rule based iteration on a node graph
> We can't predict the future from knowing this as it would require a the universe to compute it
> And we can't have a meta computer that could do so, as it couldn't be part of or connected to the universe
> Of the possible rules that can operate on the node graph, each creates a universe, and one is the actual rule that creates ours.
> Luckily there is enough compression that we can go looking for the rule without needing a spare universe to model it.
> By iterating through candidate node connection possibilities for both the graph shapes that create 'space' and the rules that determine the causality that creates options for these shapes (didn't really grok diff between 'space' graph and causality graph)
> We can create a universe that represents space and determine its dimension from the topology.
> Rules can create spaces with fractional dimensions, but the true rule we are looking for should have three dimensions (time is not the same and is the computation itself).
> The universe created has a clock speed (time as changes), an entanglement rate (when not causally connected graph changes become causally connected again) and a minimum length (much smaller than Planck length).
> Unlike Quantum Theory which is non deterministic but discrete, or General Relativity which is deterministic but continuous the universe computer operates in a world which is deterministic and discrete.
> This universe computer can, however, derive both quantum theory and general ans special relativity.

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More from @daveg

Apr 29
Wake up Europe, the digital age is bypassing you. You have no Google , Amazon, Meta, Apple. You arrogantly called SpaceX a fanciful dream and it wiped out the European Space Agency. You have no Nvidia and your response to AI has been to regulate before you have anything domestic to regulate. Your car industry is about to be wiped out by the Chinese. Your biggest economy shut down nuclear out of spite and with fraud. Your capital markets have no liquidity and your startups are drowning in bureaucracy. Your border is being attacked by Russia and your defence spending will have to triple just to be where it was with US subsidy given that part of the former Soviet Union and the Eastern bloc is now part of the EU. Your economy has slumped from the world’s largest to way behind the US. Your pensions are paid by three times less people and cost five times as much as people live longer. Your infrastructure is a model for the world but is configured for rail over self drive. Your electricity grid needs half a trillion of investment to cope with planned capacity and replacements, for the switch to renewables, within a decade. There are bright spots such as pharma and your healthcare system is a model for what civilisation looks like it. But to afford it, you need to completely transform from the industrial to digital age, to reform your institutions and rout the sclerotic bureaucratic system.
I did this interview for the Guardian nearly a decade ago, shouting at clouds about the same thing. Since then, I’d argue, things have gotten worse. It needs a massive, multinational initiative to correct, urgently. theguardian.com/technology/201…
In reply to the most contentious part of the above rant: infrastructure being configured for rail over self drive. It seems like a stupid point on the face of it, but I think it’s true. I thought self drive would never happen before ChatGPT was released, now I think it is likely and it will transform transportation and the built environment more than the switch from horses to cars. It will blur the lines between public and private transport and create the possibility of a true network of point to point carriages. Rail is the opposite of this and will not work in terms of economics of coverage. I speak as someone who loves trains and high speed rail, but I live near Geneva and to go to Bordeaux by train means going all the way to Paris and then back down the other side of France, taking twice as long and at twice the price of alternatives.
Read 5 tweets
Nov 20, 2022
Here is a recipe for how to build a place like this. Importantly, it has to be a recipe, not a design.

Establish a simple hierarchy like the human body: a head (here, the cathedral), and the rest. At building level either consciously use symmetry or consciously break it.
Have squarish spaces between buildings for people to interact. Put trees in them where possible.
Prioritise pedestrians over bicycles and bicycles and motor scooters over cars. Remove on street parking and remove bicycle lanes where spaces can be pedestrian first.
Read 9 tweets
May 4, 2022
Fantastic thread. Why movies are full of recycling franchises like Marvel while innovation in indie fringes doesn't percolate up. I suspect reason for this is the following:
Mainstream is hyperconnected, over-dense network (groupthink, ossified) and is potentially disrupted only when overall network becomes a small world one (goldilocks area between connected and Balkanized) and stuff that appears in the creative niches can bubble up to mainstream.
Reason it isn't bubbling up to mainstream is that niches have also been hijacked with their own form of groupthink (Taleb's tyranny of the minority), meaning that alternative though or creativity is suppressed where the niches are in open forum or connect to the mainstream.
Read 6 tweets
Aug 4, 2021
1. Crypto is a technical solution to pure Internet infrastructure, it can’t prevent laws against it. Financial services consist of a technical and regulatory component.
2. The adoption of Internet based currency tokens by central banks uses a crypto based technical solution to replace banking rails with the Internet. It doesn’t use the crypto aspect for regulation so is not decentralised.
3. DeFi extends crypto solutions to financial products and ownership more widely. Financial products are basically fungible contracts and ownership, transferable non fungible ones.
Read 8 tweets
Apr 12, 2021
China's digital currency, what does it mean?

1. Coins & notes can be replaced by digital and govt now has a way to funnel cash directly to citizens, UBI style.
2. Bitcoin is not challenged much by this. It is digital gold and truly decentralized.
3. Yes it is a step away from dollar hegemony because...
Read 10 tweets
Apr 7, 2021
The end of growth .
1. The growth in number of Internet users has halted.
2. Our attention is saturated.
3. Toxicity on social media creates reverse network effects.
Read 17 tweets

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