L2: Can Computers Think?
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Questions and Answers

"The philosophical view that the mind and body (or brain) are fundamentally different substances" is known as ______.

dualism

René ______ was a key proponent of Dualism, arguing that the mind is non-physical and separate from the material body.

descartes

______ Naturalism argues that consciousness is a biological property of the brain.

biological

______ functionalism is the idea that mental states are defined by their functional roles rather than their physical implementation

<p>computational</p> Signup and view all the answers

______ Realizability is the idea that a particular mental function can be implemented in different physical substrates.

<p>multiple</p> Signup and view all the answers

The ______ Room Argument is a thought experiment against strong AI.

<p>chinese</p> Signup and view all the answers

The ______ Test evaluates a machine's ability to exhibit intelligent behavior indistinguishable from a human.

<p>turing</p> Signup and view all the answers

The ______-knowledge tradeoff problem is one of the reasons why GOFAI failed.

<p>speed</p> Signup and view all the answers

According to Newell and Simon's hypothesis, any system manipulating symbols via rules can show general ______.

<p>intelligence</p> Signup and view all the answers

[Blank]'s paradox highlights the difference in difficulty between high-level reasoning and low-level skills for AI.

<p>Moravec</p> Signup and view all the answers

The ______ Approximation Theorem states that a neural network with one hidden layer can approximate any continuous function.

<p>Universal</p> Signup and view all the answers

In Reinforcement Learning, an agent learns to maximize long-term rewards by interacting with an ______.

<p>environment</p> Signup and view all the answers

[Blank] RL involves learning directly from trial and error without building a model of the environment.

<p>Model-Free</p> Signup and view all the answers

The ______-Exploitation Tradeoff in RL requires balancing trying new actions vs. using known good actions.

<p>Exploration</p> Signup and view all the answers

[Blank] is the belief that complex systems can be understood by breaking them down into simpler parts.

<p>Reductionism</p> Signup and view all the answers

The traditional AI approach that relies on explicitly programmed symbolic rules rather than learning from data is termed Good-Old-Fashioned ______ (GOFAI)

<p>AI</p> Signup and view all the answers

The ______ Problem makes it hard for AI to determine which information is relevant in a given situation, making real-world decision-making difficult.

<p>Frame</p> Signup and view all the answers

The ______ Problem: Neural networks typically require thousands of examples, whereas humans can learn from just one or a few.

<p>One-Shot</p> Signup and view all the answers

Flashcards

Dualism

Philosophical view that mind and body are different substances.

Biological Naturalism

Theory claiming consciousness is a biological property like digestion.

Computational Functionalism

Mental states defined by functional roles, not physical form.

Multiple Realizability

Idea that mental functions can exist in different physical forms.

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Chinese Room Argument

Thought experiment showing machines lack true understanding despite symbol manipulation.

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Turing Test

Measure of a machine's ability to imitate human-like intelligence via conversation.

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GOFAI

Good-Old-Fashioned AI focused on symbolic systems and logic-based functions.

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Know-how Problem

Challenge in programming explicit knowledge and skills into AI systems.

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Moravec’s Paradox

The observation that high-level reasoning is easy for AI, but low-level skills are extremely difficult.

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Symbolic System

A system that represents knowledge using symbols and rules, like chess-playing AI.

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Universal Approximation Theorem

A neural network with a hidden layer can approximate any continuous function with enough neurons.

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One-Shot Learning Problem

The challenge where neural networks typically require many examples to learn, unlike humans who can learn from few.

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Model-Free RL

Reinforcement learning where the agent learns directly from trial and error without a model of the environment.

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Exploration-Exploitation Tradeoff

The challenge of balancing trying new actions versus using known good actions in reinforcement learning.

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Reductionism

The belief that complex systems can be understood by breaking them down into simpler parts.

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Systems Level Reductionism

A type of reductionism that breaks intelligence into functional modules like vision and memory.

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Study Notes

L2: Can Computers Think?

  • Dualism: Mind and body are fundamentally different substances (non-physical mind separate from the physical body). Descartes championed this view.
  • Biological Naturalism: Consciousness is a biological property of the brain, similar to digestion. Computers can simulate, but not truly have, consciousness (Searle).
  • Computational Functionalism: Mental states are defined by their functional roles; intelligence can be realized in multiple systems (including computers).
  • Multiple Realizability: A mental function can be implemented in various physical substrates (brains, chips).
  • Why Almost Any Computer Could Have Intelligence: Due to multiple realizability and computational functionalism, intelligence is not bound to the biological brain. Powerful computation systems could exhibit intelligent behavior.
  • Chinese Room Argument: An AI can manipulate symbols without truly understanding their meaning. A person in a room following rules to respond to Chinese characters cannot understand Chinese. This argues against Strong AI (that an AI can understand).
  • Turing Test: Evaluates a machine's ability to exhibit intelligent behavior indistinguishable from a human. Focuses on observable behavior, not internal processes. Powerful because of this focus.

L3: GOFAI / Symbolic Systems

  • Symbolic System: Represents knowledge and reasoning using symbols (rules, logic). Example: Chess-playing AI using search trees.
  • Symbolic System Hypothesis: Manipulating symbols according to rules can exhibit general intelligence (Newell & Simon).
  • GOFAI (Good Old Fashioned AI): Traditional AI approach relying on explicitly programmed symbolic rules. Doesn't learn from data, unlike modern AI.
  • GOFAI Failures (Three Reasons):
    • Know-How Problem: Difficult to encode implicit human knowledge (e.g., riding a bike) as explicit rules.
    • Speed-Knowledge Tradeoff: More knowledge = slower decision-making due to complex rule-based reasoning.
    • Frame Problem: Difficulty determining which information is relevant in a particular situation, leading to problems in real-world decision-making.
  • Moravec's Paradox: High-level reasoning (chess) is easier for AI, but low-level skills (walking, object recognition) are difficult.

L4: Connectionism

  • Artificial Neuron: Mimics a biological neuron, receiving inputs, applying weights, summing and passing the result through an activation function (sigmoid, ReLU).
  • Multi-Layer Perceptron (MLP): Multiple layers of neurons (input, hidden, output) for complex pattern recognition.
  • Universal Approximation Theorem: MLP with at least one hidden layer can approximate any continuous function.
  • Neural Network Challenges (Three):
    • One-Shot Learning Problem: Neural networks usually need thousands of examples to learn, unlike humans who can learn with just a few.
    • Curse of Universal Learners (Lack of Inductive Priors): Neural networks learn everything from scratch, unlike humans who use prior knowledge to generalize efficiently.
    • Mirrors of Intelligence: AI systems may mimic intelligence without true understanding.

L5: Reinforcement Learning

  • Basic Idea Behind RL: An agent learns by interacting with an environment and maximizing long-term rewards.
  • Model-Free vs. Model-Based RL:
    • Model-Free: Learns directly from trial and error without an environmental model.
    • Model-Based: Builds an internal environment model to plan before acting.
  • RL Challenges:
    • Sparse Rewards: Environments with little reward make learning slow.
    • Exploration-Exploitation Tradeoff: Balance trying new actions (exploration) vs. using known good actions (exploitation).
    • Need a Training Ground: RL often requires simulated environments or expensive real-world interactions.
    • Non-Stationarity: World changes, so current strategies may not work tomorrow.
    • Alignment Problem: Ensuring AI goals align with human values.

L6: Bottom Up

  • Why Study Human & Animal Intelligence?: Understanding biological intelligence inspires efficient AI architectures. Humans and animals have evolved effective problem-solving.
  • Reductionism: Complex systems are understood by breaking them into simpler parts.
  • Arguments for Reductionism:
    • Scientific Field Success: Physics, chemistry, and biology have benefited from reductionism.
    • Rich Explanations: Protects from overly broad or vague explanations.
  • Types of Reductionism:
    • Systems Level (Modularity): Breaking down intelligence into functional units (vision, memory).
    • Neural Level: Understanding intelligence at the neuronal and synaptic connection level.

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Description

Explore the philosophical perspectives on whether computers can think. Delve into concepts like dualism, biological naturalism, and computational functionalism to understand the debates around consciousness and intelligence. This quiz will challenge your views on AI and its capabilities.

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