Mind Body Dilemmas Slides
Philosophy of Mind Substance & Causality
Mind-Body Dilemmas
Beyond Cartesian Interaction: Parallelism to Non-Cartesian Dualism
Part I: No Interaction
Parallelism, Occasionalism & Humean Causality
Part II: Radical Revisions
Idealism & Epiphenomenalism
Part III: Contemporary Coda
E. J. Lowe's Non-Cartesian Dualism
3.1 Substance Dualism
Dualism Without Interaction: Parallelism
G. W. Leibniz
Parallelism Scheme: Correlation Without Causation
Mental Realm
Decision \(M_1\) → Intention \(M_2\) → Experience \(M_3\)
⇅covaries ⇅covaries ⇅covaries
Physical Realm
Neural State \(P_1\) → Limb Move \(P_2\) → Impact \(P_3\)
The Clockmaker Analogy
Like two synchronized clocks running in perfect tandem without any physical wire connecting them, mental and material events tick together.
The Dilemma: Is this synchronization an inexplicable brute fact or an appeal to divine pre-established harmony?
Key Takeaway: Parallelism resolves Descartes' interaction puzzle by denying that minds move matter, yet risks ad-hoc metaphysics to explain why unlinked realms perfectly correspond.
3.2 Divine Intervention
Occasionalism: God as the Active Nexus
Nicolas Malebranche
The "Stepping on a Tack" Scenario
1. Physical Event Bare foot steps onto sharp tack
↓ God wills sensation on this occasion ↓
2. Mental Event Sharp conscious sensation of pain
↓ God wills physical motion on this occasion ↓
3. Physical Action Leg pulls away; person leaps
Occasioning vs. Causing
Creatures have finite wills, but no creaturely event possesses inherent causal efficacy. Every event is merely an occasion for God to manifest power.
The Critical Question
If an immaterial finite mind cannot push matter, how does an immaterial God act on matter without re-introducing Cartesian interaction problems?
Key Takeaway: Occasionalism denies genuine causal power to created things, turning God into the universal coordinator who syncs physical stimuli, conscious experiences, and motor responses.
3.3 The Nature of Causality
Causation: Transference vs. Regularity
Descartes vs. Hume
Descartes: Causal Transference
The Billiard Cue
Causation requires transferring a quantity (such as motion or energy) from cause to effect through a real connecting mechanism.
The Fatal Flaw: If mind and body share no physical properties or spatial dimensions, no quantity can transfer between them.
Hume: Constant Conjunction
Bare Regularity
We observe only regular succession. There is no visible causal nexus or tie, even among purely material events in physics.
The Equalizer: If physical causation is merely observed regularity, mental-physical interaction is no more mysterious than physical-physical events!
Key Takeaway: If causation requires a physical "transfer link," dualist interaction fails. But if causality is just regular covariation (Hume), the mind-body link is no more problematic than billiard balls colliding.
3.4 Monistic Alternatives
Idealism: Matter as an Illusion
George Berkeley
Dissolving Interaction
Idealism resolves the mind-body problem by eliminating matter: reality consists exclusively of minds and their ideas.
Physical reality is an orderly sequence of sensory experiences, not mind-independent matter.
How Is Regularity Explained?
1. Intrinsic Nature
The internal structure of minds intrinsically formats and organizes thoughts predictably.
2. Berkeley's God
A benevolent God continuously implants perceptions in our minds in lawful harmony.
Solipsism Variant: Only a single mind and its private impressions exist.
Key Takeaway: Idealism bypasses interaction by dismissing the physical realm as an illusion; empirical regularity stems directly from divine ordination or cognitive architecture.
3.5 Semantic Defense
Mind and Meaning: Unthinkability of Matter
Idealist Epistemology
The Semantic Thesis
Idealists argue that realism is not merely factually mistaken, but literally unintelligible.
Every thought, term, or concept we possess derives exclusively from sensory perceptions and conscious mental states.
A "mind-independent material object" is a concept drained of all content—an empty, ungraspable abstraction.
The Conceptual Trap
Attempting to conceive it: The moment you imagine a tree unperceived in a forest, you are conceiving it in your conscious thought.
The Conclusion: We cannot step outside our own ideas to compare them with an independent external substrate.
Key Takeaway: For the idealist, positing mind-independent matter is not an empirical error, but a semantic impossibility; reality is intrinsically constituted by meaningful ideas.
3.6 One-Way Causation
Epiphenomenalism: The Steam from the Engine
Causal Closure
One-Way Causal Production
Sensation: Pain
(Inert / No Power)
Experience: Will
(Inert / No Power)
↑ (causes) ↑ (causes)
Neural State \(N_1\) → (causes) → Neural State \(N_2\) (Withdrawal)
Analogies: The squeak of shoes, computer heat exhaust, or a locomotive's steam whistle.
Major Theoretical Hurdles
- • Common Experience: It contradicts intuition that pain doesn't cause pulling away.
- • Dangling Causes: Feigl's "nomological danglers"—mental states are dead-ends that cause nothing.
- • Mental Continuity: Thoughts cannot cause subsequent thoughts.
Key Takeaway: Epiphenomenalism preserves physical causal closure by making conscious mental life an inefficacious byproduct of physical brain states.
3.7 Contemporary Coda (Part 1)
Non-Cartesian Dualism: The Substantial Self
E. J. Lowe
The Bronze & Statue Metaphor
The Statue of Athena is constituted by a lump of bronze, but has different persistence conditions:
• Bronze Lump: Survives being melted down; destroyed if broken.
• Statue: Survives arm replacement; destroyed if melted down.
Likewise: You are constituted by, but not identical to, your body or your brain.
The Self as Simple Substance
No Substantial Parts: The body is complex with detachable parts. The self has no parts—mental faculties are unified powers of the subject.
Physical & Mental Characteristics: You have mass and height directly; you have two arms derivatively through your body. Thoughts belong to you, not your brain.
Key Takeaway: Lowe avoids Cartesian dualism by denying that the self is an immaterial phantom: the self is a simple substance possessing both psychological and physical attributes.
3.7 Contemporary Coda (Part 2)
Mental Action: The Spider in the Web
Holistic Causation
The Problem with Causal Chains
Injecting a decision into a neural chain violates physical conservation of mass-energy and causal closure.
Tracing backward reveals a tangled, complex web of firing neurons—there is no single isolated link where a mental push enters.
The Web Analogy
Pattern Facilitator
The spider does not physically propel every thread. The structured web constrains and coordinates possibilities, enabling unified action.
The Self's Role: The self does not inject mechanical force into neural chains. It ensures that an entire tree of causal sequences converges into purposeful action.
Key Takeaway: Voluntary agency does not require breaking the laws of physics with immaterial pushes; the self structures and unifies whole configurations of physiological causes.
Summary & Synthesis
Comparative Framework of Mind-Body Models
Master Review
Doctrine
Substance Ontology
Causal Mechanism
Primary Vulnerability
Parallelism
Mental + Physical Dualism
No interaction; covariation
Ad-hoc brute fact / clock sync
Occasionalism
Mental + Physical Dualism
God acts on each occasion
Divine interaction dilemma
Idealism
Mental Monism only
Perception within minds
Counter-intuitive / Solipsism
Epiphenomenalism
Physical + Mental Properties
One-way (Physical → Mental)
Denies mental causal efficacy
Lowe's Dualism
Substantial Self ≠ Body
Holistic pattern facilitation
Explaining non-chain causation
Concluding Insight: Moving beyond Cartesian interactionism forces a fundamental choice: redefine what causes are (Hume), redefine what substances exist (Berkeley, Lowe), or rethink the causal power of consciousness (Epiphenomenalism).
