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Brett Kagan is the Chief Scientific Officer at Cortical Labs, the Australian startup that fuses living human neurons with silicon chips to create a fundamentally new kind of intelligence. His team's DishBrain paper showed that neurons in a dish learned to play Pong in under five minutes — without any reward signal — providing some of the strongest experimental evidence for Karl Friston's Free Energy Principle.
Expect to learn how neurons on a chip actually play Pong and Doom, why unpredictable stimulation drives learning better than reward, what the Free Energy Principle really says and where Brett disagrees with Friston, why 200,000 neurons outperform 800,000 on certain tasks, how Brett's baby daughter staring at fractals led to a new theory of intelligence, why no AI system can walk into your kitchen and make a cup of tea, what biological data centres look like and why they already exist, and much more…
Timestamps:
00:00 Trailer
02:30 Brett Kagan — Neurons Playing Doom
03:04 The stepping stones from Pong to Doom
04:00 What is the CL1 and Cortical Cloud?
05:20 The moonshot goal of Cortical Labs
06:46 Giant buildings of neurons as computation hubs
07:13 The biocomputing data centre already running in Melbourne
07:38 Not building a brain in a dish
09:00 What does a biological computer actually look like?
09:29 Electricity as the shared language between biology and silicon
10:49 How neurons on a chip play Pong
11:10 Topographic mapping inspired by the whisker barrel system
13:10 Why the neurons hit the ball — and what happens when they miss
14:33 The Free Energy Principle explained simply
16:03 The trap door analogy for unpredictable stimulation
18:42 How the structure of neuron cultures shapes performance
19:19 Bees vs elephants: why bigger brains aren’t always better
21:37 Growing hippocampal place cells in a dish
24:12 Teaching neurons Morse code
28:27 The Free Energy Principle — cups, predictions and surprise
32:29 Where Brett disagrees with Friston
37:03 The dog treat problem — how do you reward a neuron?
39:40 Complexity as a hidden driver of intelligence
41:53 His baby daughter’s obsession with fractals
43:57 Defining agency — the three orders of information processing
50:33 Change how you change over time
53:27 Why scientists are incentivised to be vague instead of wrong
59:42 J.D. Bernal’s 1929 vision for brains beyond bodies
1:02:38 Standing on the shoulders of iPSC pioneers
1:03:14 Can neurons play chess? Moravec’s Paradox
1:04:12 No AI can walk into your kitchen and make tea
1:05:16 Augmenting what silicon is bad at
1:06:35 Is general intelligence even possible for silicon?
1:09:40 Why 200,000 neurons beat 800,000
1:11:16 Complexity and structure matter more than scale
1:11:58 Could biological neurons end up in your laptop?
1:13:36 Edge robotics and the future of biological computing
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