Let's escapes boredom with Andy Clark

This post is based on A nice surprise? Predictive processing and the active pursuit of novelty (2018), Andy Clark.

The Brain is a Prediction Machine (Predictive Processing Theory)

Basic idea: the brain is made for predicting what it would perceive. And experiments show how it is using Bayesian inference.

Let's Read: Facing Up to the Problem of Consciousness (1995), by David Chalmers

Facing Up to the Problem of Consciousness (1995) is a famous paper by David Chalmers, and it talks about the easy problem of consciousness, the hard problem of consciousness, a sketch of how "usual" attempts to solve the hard problem fails, and how it might be solved.

Chalmers did a TED talk about his ideas. A Let's Read to the paper itself follows.

Nematode matricide, evolution of ageing, and offspring-mother conflicts

Let's start with one death. Pristionchus pacificus eating a Caenorhabditis elegans.

Pristionchus pacificus is a nematode that can eat many kinds of foods. In this video, it uses a small tooth to puncture the cuticle of its prey, then sucks in the contents.

The Celens (imma call C elegans that) come in two sexes: male and herm. Herms contain only about 300 sperm cells, after using them all, the herm cannot fertilize more eggs, unless it gathers more from mating with a male. Males cannot reproduce on their own and must mate with a herm to produce offsprings.

Causality is not fundamental in the world

Today we tear down the illusion of causality, with quantum mechanics.

This started when I was reading The Order of Time (2018) by the rather poetic physicist Carlo Rovelli, and read that he said that causality is not certain, and two events can have a superposition of causality: a superposition of two possibilities: A causes B, and B causes A.

Quantum corelations with no causal order

The paper that started this seems to be a highly cited (over 200 currently) Quantum correlations with no causal order (2012), Ognyan Oreshkov, Fabio Costa, Časlav Brukner.

The abstract starts with a question: is causality fundamental?

Let's Read: some mind-bending papers from Anil Seth

Anil Seth studies the neuroscience of consciousness. Here's a presentation where he talked about it for 50 minutes. 

Basic points from the talk:

Let's Read: Mind Children (1988) by Hans Moravec

This book is half outdated and half amazing. The outdated parts are where he talked about the "latest" advances in AI and robotics, such as the amazing robots that could move across a cluttered room in just 5 hours! (and fails 1/4 of the times). This is why I skipped most of the first 3 chapters.

One great thing I found in the book is a very poetic description of a "Bush Robot" which can be best explained by ponies:

Bush Robot Scootaloo

Fermi or DIE! More studies on Fermi paradox.

In this post we review some new (after 2010 at least) solutions to the Fermi paradox, or "the Great Silence".

Aestivation hypothesis

Proposed in That is not dead which can eternal lie: the aestivation hypothesis for resolving Fermi’s paradox (2017), by Anders Sandberg, Stuart Armstrong, Milan Ćirković. 

[Aestivate: to sleep through the summer, or a period too hot for living. The opposite of "hibernate".]

Idea: Aliens are sleeping until the far future, when the universe is cold enough, to maximize computation. The reason is that cold = more efficient use of energy for computation, according to the Landaur limit: $E\ge kT\ln(2) \text{Joule}$ need to be dissipated for an irreversible change of one bit of information.

... this can produce a $10^{30}$ multiplier of achievable computation. We hence suggest the “aestivation hypothesis”: the reason we are not observing manifestations of alien civilizations is that they are currently aestivating...

The phrase "That is not dead which can eternal lie" comes from a poem by H. P. Lovecraft, a philosopher ahead of his time who really understood how human thoughts matter little in a cosmic viewpoint.

A civilization would aestivate if: