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Lex Fridman Podcast
#120 – François Chollet: Measures of Intelligence
Aug 31, 2020
02:34:47
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Quick takeaways
- The paper discusses the two views of intelligence: evolutionary psychology vs. blank slate.
- GPT-3's performance heavily relies on training data and lacks constraints like factualness and consistency.
- Higher quality data and explicit reasoning models can improve performance and generalization of AI models.
- General intelligence should be measured by the ability to adapt to new situations and acquire new skills efficiently.
- Tests of intelligence should consider knowledge priors and control for training data to compare human and artificial intelligence.
Deep dives
The Two Views of Intelligence
The paper addresses two divergent views of intelligence. The evolutionary psychology view sees the mind as a collection of static special purpose mechanisms, while the blank slate view sees the mind as an information sponge that learns from experience.
GPT-3 and Learning
The paper discusses GPT-3 and its ability to generate plausible text. However, it notes that GPT-3 lacks constraints such as factualness and consistency. GPT-3's performance heavily relies on the patterns it has seen in its training data, and it may not generalize well to novel situations or tasks.
Scaling GPT Models
Scaling GPT models by increasing the size or training data is possible but has diminishing returns. The bottleneck is often the training data quality rather than the size of the model. Higher quality data and explicit reasoning models can result in better performance and more effective generalization.
Intelligence and Driving
The paper suggests that achieving L5 autonomous driving does not necessarily demonstrate general intelligence. The ability to adapt to new situations and acquire new skills efficiently, especially for unknown tasks, is a better measure of intelligence.
Measuring Intelligence and Generalization
Intelligence is characterized as the ability to efficiently generalize beyond the distribution of previous experiences. It involves both the ability to handle radically new situations and the efficiency in dealing with them. Intelligence can be seen as a ratio between the area of possible situations covered by a behavioral program and the amount of information it starts with. Tests of intelligence should account for knowledge priors and control for training data in order to compare human and artificial intelligence.
The Structure of Human Cognitive Abilities
Human cognitive abilities exhibit a hierarchical structure with a general factor (G-Factor) at the top. Different tests of intelligence correlate with each other, indicating the presence of a latent variable that explains the observed correlations. The G-Factor captures the common underlying ability that accounts for the correlation between different cognitive tasks. However, the G-Factor does not imply universal intelligence and human abilities remain specialized within the constraints of the human condition.
Challenges of IQ Tests and Test Design for Machines
The Turing test and similar tests that rely on human judgment are not ideal for measuring intelligence in machines. They often lack reliability, standardization, and freedom from bias. Constructing a test for machines that properly measures intelligence requires explicit consideration of knowledge priors and the ability to handle novelty. The goal should be to measure skill acquisition efficiency and generalization to unfamiliar situations, while avoiding reliance on tricks or deceptive methods.
The ARC Challenge and Core Knowledge Priors
The ARC Challenge is an attempt to embody principles of a good test of machine intelligence and human intelligence. It follows a format similar to classic IQ tests, with tasks that require transforming input grids into proper output grids. The key idea is that every task should only require core knowledge priors, without relying on outside knowledge or concepts. The challenge aims to probe abstraction and the human problem-solving process, revealing tasks that are easy for humans but near impossible for machines.
Compression, Cognition, and the Meaning of Life
The idea of intelligence as compression, where cognition is seen as a compression algorithm, is challenged. While compression is a useful tool in cognition, it is not the essence of cognition itself. Cognition is about operating in future situations with uncertainty and novelty, not just compressing the past. The meaning of life, according to François Chollet, lies in the propagation of our actions, thoughts, and creations as reports in the collective edifice of culture. It is through contributing to culture that we create ripples into the future, influencing the minds of future humans and AGI systems.
19.
Is Scaling Scaling Neural Networks the Way to General Artificial Intelligence?
2min
François Chollet is an AI researcher at Google and creator of Keras.
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Episode links:
Francois’s Twitter: https://twitter.com/fchollet
Francois’s Website: https://fchollet.com/
On the Measure of Intelligence (paper): https://arxiv.org/abs/1911.01547
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Here’s the outline of the episode. On some podcast players you should be able to click the timestamp to jump to that time.
OUTLINE:
00:00 – Introduction
05:04 – Early influence
06:23 – Language
12:50 – Thinking with mind maps
23:42 – Definition of intelligence
42:24 – GPT-3
53:07 – Semantic web
57:22 – Autonomous driving
1:09:30 – Tests of intelligence
1:13:59 – Tests of human intelligence
1:27:18 – IQ tests
1:35:59 – ARC Challenge
1:59:11 – Generalization
2:09:50 – Turing Test
2:20:44 – Hutter prize
2:27:44 – Meaning of life
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