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Physicalism and Theories of Mind

Core Doctrine: Physicalism

Foundational Claim

Physicalism is the doctrine that everything that exists, including mental phenomena, is physical or supervenes on the physical. Physicalism takes many forms but insists there are no non-physical substances or properties. It sets the stage for most modern materialist theories of mind.

Philosophical Behaviourism

Philosophical behaviourism focuses on how mental states can be explained in terms of behaviour, breaking down into two main approaches:

1

Hard Behaviourism (Hempel)

Mental state statements can be reduced entirely to descriptions of physical behaviour or bodily movements without loss of meaning.
2

Soft Behaviourism (Ryle)

Mental states are dispositions to behave in certain ways; they are statements of behavioural tendencies.

Hard Behaviourism Illustration

Carl Hempel's approach demands strict reduction of mental terminology to physical observables.

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If we eliminate the word "pain," what does the mental statement become?
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For example, saying "John is in pain" can be rephrased only in terms of John’s writhing or cries for help.

Soft Behaviourism: The Disposition

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Key Insight (Gilbert Ryle): Mental states are dispositions to behave in certain ways. For example, pain means that someone is disposed to wince or avoid harmful stimuli.

Issues with Behaviourism

The main challenges arise from the separation between inner experience and external manifestation.

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Super-Spartans

People who do not show pain behaviour despite feeling pain, challenging the idea that pain equals behaviour (Putnam).
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Simulation

Perfect actors can simulate behaviours without genuine mental states; this discredits reducing mind to behaviour.
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Asymmetry and Circularity

Problems include circularity (defining mental states requires other mental state terms) and self-knowledge asymmetry.

Mind-Brain Type Identity Theory

This theory asserts an equivalence between mental kinds and neural kinds.

Mental State Type = Brain State Type
This is an ontological reduction, not an analytic one. Mental and brain state terms are not synonymous, but mental states are, in reality, brain processes. Jack Smart championed this view.

Issues for Type Identity

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Core Assertion Jack Smart suggested sensations are identical to specific brain processes, linking internal experience directly to material events.
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Major Challenge: Multiple Realisability A single mental state type (e.g., 'pain') can be realized by different brain states across species or individuals, which complicates strict type identity.

Eliminative Materialism

Advocated by the Churchlands, this view seeks to discard traditional psychological terms entirely.

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Folk Psychology

Common-sense concepts like beliefs, desires, and pains that EM argues do not correspond to real psychological entities.
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Elimination

These concepts should be eliminated and replaced entirely by neuroscientific descriptions.

EM: The Deficiencies Ledger

Critics list several reasons why eliminating folk psychology is unwarranted or problematic.

Issue Description Severity
Our Certainty of States High
Folk Psychology's Predictive Power Medium
Failure to Meet Explanatory Standards (Contested)
Total Deficit: Self-Refutation
Physicalism & Related Theories Deck
Term
Physicalism

What is physicalism?

Answer
Definition

The doctrine that everything that exists is physical or supervenes on the physical.

Term
Philosophical Behaviourism

What does philosophical behaviourism focus on?

Answer
Focus

Explaining mental states in terms of behaviour.

Term
Hard Behaviourism

What is hard behaviourism?

Answer
Definition

The view that mental state statements can be fully reduced to descriptions of physical behaviour.

Term
Example of Hard Behaviourism

What is an example of hard behaviourism?

Answer
Example

Saying "John is in pain" means John is writhing or crying for help.

Term
Soft Behaviourism

How does soft behaviourism differ from hard behaviourism?

Answer
Difference

It sees mental states as dispositions or tendencies to behave, not direct physical behaviour.

Term
Criticism: “Super-Spartans”

What is a key criticism of behaviourism related to “Super-Spartans”?

Answer
Criticism

People might feel pain without showing any pain behaviour, challenging behaviourism's reduction.

Term
Mind-Brain Type Identity Theory

What does the mind-brain type identity theory claim?

Answer
Claim

Every type of mental state corresponds to a type of brain state.

Term
Proponent

Who is a major proponent of the mind-brain type identity theory?

Answer
Person

Jack Smart.

Term
Multiple Realisability

What is multiple realisability?

Answer
Definition

Mental states can be realized by different physical or brain states in different beings.

Term
Eliminative Materialism

What is eliminative materialism?

Answer
Claim

The claim that folk-psychology concepts like beliefs and desires don't exist and should be replaced by neuroscientific terms.

Term
Advocates

Who are the main advocates of eliminative materialism?

Answer
People

Patricia and Paul Churchland.

Term
Issue with Eliminative Materialism

What is a major issue with eliminative materialism?

Answer
Problem

It is self-refuting because it relies on folk psychology concepts to argue against folk psychology.

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🧠 Physicalism Quiz

1. What does physicalism assert?

Physicalism insists all phenomena either are physical or depend on the physical.

2. Hard behaviourism claims mental states can be fully explained as:

Hard behaviourism reduces mental state statements entirely to observable behaviour.

3. True/False: Soft behaviourism defines mental states strictly as physical behaviours.

Soft behaviourism defines mental states as dispositions or tendencies to behave, not direct behaviours.

4. Which of these is a criticism of behaviourism?

‘Super-Spartans’ challenge behaviourism by showing that pain doesn’t always lead to observable behaviour.

5. According to the mind-brain type identity theory, mental states are:

Mental states correspond directly to brain state types in this theory.

6. Eliminative materialism proposes to:

It argues folk psychology is false and should be eliminated.

📊 Results

  • Notes and Quiz
  • PHILOSOPHY
  • A Level
  • Philosophy of Mind
  • AQA