Extended mind theory: a primer

• A. Human minds are located entirely inside the skull and cannot be influenced by external objects.
• B. Cognitive processes can sometimes extend beyond the brain into external objects and environmental resources.
• C. Only conscious thoughts count as mental states, while unconscious processes are not part of the mind.
• D. Computers will eventually replace the human brain as the primary site of cognition.

• A. His memory of the museum's location, which he recalls from years of visits.
• B. A notebook in which he has written down the museum's address, which he consults as needed.
• C. Directions given to him by a friend that he memorized the night before.
• D. Instinctive spatial awareness that guides him through familiar city streets.

• A. When the external process is located within a person's immediate physical reach.
• B. When the external process is performed by a human rather than a machine.
• C. When the external process functions in a way comparable to an internal cognitive process that we would readily count as mental.
• D. When the external process is consciously monitored by the person at all times.

• A. A person feeling a sudden emotion after hearing bad news.
• B. A person using a smartphone's map app to plan and follow a route through an unfamiliar city.
• C. A person dreaming about their childhood home during sleep.
• D. A person's heart rate increasing during a stressful exam.

• A. That external tools are too heavy to be carried around, making them impractical for cognition.
• B. That objects outside the body cannot store information, so they can never play any cognitive role.
• C. That treating external resources as part of the mind would make the mind too broad, blurring the line between thinking and mere environmental support.
• D. That the brain is too small to process all the information required for everyday tasks.

• A. Cognitive processes always take place inside the skull of the thinking agent.
• B. If an external process functions in the same way as a process that would be counted as cognitive if it occurred in the head, then that external process should also count as part of the mind.
• C. External tools are useful but never constitute genuine cognition.
• D. Only conscious mental states can be considered part of the mind.

• A. Inga has a brain injury, while Otto is healthy.
• B. Otto relies on a notebook to store information he uses to navigate to the museum, while Inga relies on her biological memory.
• C. Inga speaks multiple languages, while Otto speaks only one.
• D. Otto is a philosopher, while Inga is a museum guide.

• A. Because Otto reads the notebook while he is sleeping.
• B. Because the notebook is information that is reliably available, automatically endorsed, and easily accessible, functioning much like biological memory.
• C. Because the notebook was written by a scientist.
• D. Because the notebook contains emotional memories that Otto cannot recall.

• A. That external resources are always more reliable than biological memory.
• B. That the mind must be located in the brain, so external resources can never be parts of it, which they regard as question-begging.
• C. That notebooks are too expensive for most people to own.
• D. That Otto cannot read his own handwriting.

• A. Two people who share a single mental state.
• B. A brain connected to a computer through a wire.
• C. An integrated system of agent and environmental resources in which the external components play an active role in driving behavior, such that together they form a cognitive whole.
• D. A pair of identical twins whose thoughts are correlated.

• A. A naturally occurring object found in the environment that has no connection to human thought
• B. An external object, such as a notebook or calculator, that is designed to help people perform or support cognitive tasks ✓
• C. A mental representation stored entirely inside the brain without any external support
• D. A computer program that replaces the need for human reasoning

Why: Cognitive artifacts are external tools designed to aid thinking, memory, and reasoning. Extended Mind Theory treats them as functionally integrated into cognition, not merely as aids sitting outside it.

• A. Recalling a childhood phone number entirely from internal recollection
• B. Relying on a shopping list written on paper to remember what to buy ✓
• C. Solving a math problem by mentally rehearsing each step
• D. Remembering a song melody after hearing it once

Why: A written shopping list functions as external memory: it stores information outside the head and is consulted when needed, much like internal memory retrieval.

• A. Internal cognitive processes are always more reliable than external ones
• B. If an external process plays the same role as an internal cognitive process, it should count as part of the mind ✓
• C. Cognition must always be located entirely inside the skull
• D. Only biological processes can be considered cognitive

Why: The parity principle holds that external components that function in the same way as internal cognitive processes should be counted as part of the cognitive system, regardless of their location.

• A. The resource must be expensive and difficult to obtain
• B. The resource must be reliably available and typically accessed without much hesitation ✓
• C. The resource must be controlled by a government or institution
• D. The resource must be used only by experts

Why: Clark and Chalmers' 'glue and trust' conditions require that the resource be reliably available and that the person automatically endorse and trust its information, as with a well-used notebook.

• A. It shows that people with memory loss cannot function in society
• B. It compares a person who relies on an internal memory with a person who relies on a notebook, arguing both may have similar beliefs ✓
• C. It proves that all memories are stored in the brain's hippocampus
• D. It demonstrates that writing always weakens memory

Why: In the Otto case, Otto consults a notebook for directions to a museum just as Inga consults her internal memory. Clark and Chalmers argue the notebook plays the same functional role, so Otto's beliefs are extended into the notebook.

• A. When it is manufactured by a human designer
• B. When it functions in a way that, were it located in the head, we would unhesitatingly count it as part of cognition
• C. When it is physically attached to the body via a wearable device
• D. When it produces representations that match internal mental states

• A. Otto has a hearing impairment and uses a hearing aid
• B. Otto has Alzheimer's disease and uses a notebook to store information about where to find things
• C. Otto has a motor disability and uses a wheelchair to navigate museums
• D. Otto has amnesia and uses a smartphone to recall appointments

• A. The resource must be made of biological tissue
• B. The resource must be reliably available and typically invoked, with information automatically endorsed once accessed
• C. The resource must be used exclusively by one individual
• D. The resource must be understood consciously at all times by the user

• A. It rejects all forms of embodiment and claims cognition is purely symbolic computation
• B. It shares the view that cognition is not confined to the skull, extending the boundaries of mind beyond the brain and body
• C. It argues that cognition occurs only inside the brain, as a closed internal system
• D. It holds that the body plays no role in shaping thought processes

• A. That tight causal coupling between brain and environment does not by itself show that the external element is a constituent of cognition rather than merely a causal influence
• B. That external tools always slow down cognitive processing
• C. That humans lack any memory capacity outside the brain
• D. That all cognition is identical across species and environments

• A. Inga
• B. Otto ✓
• C. Rudolf
• D. Martin

Why: Otto is the character with Alzheimer's disease who uses a notebook as an external memory store, and his case is the central example in Clark and Chalmers' 1998 paper 'The Extended Mind'.

• A. Mistaking a causal connection between brain and environment for a claim that the environment is part of the mind ✓
• B. Assuming that all external tools are cognitive tools
• C. Believing that memory is stored only in neural tissue
• D. Confusing the mind with the body as a whole

Why: Critics such as Adams and Aizawa argue that Clark and Chalmers move illegitimately from the fact that brain and notebook are tightly coupled (causal interaction) to the conclusion that the notebook constitutes part of the mind; coupling alone does not establish constitution.

• A. The parity principle ✓
• B. The exclusion principle
• C. The supervenience principle
• D. The reductionist principle

Why: The parity principle states that if an external process plays the same role in guiding behavior as an internal process would, then the external process should count as part of the cognitive system.

• A. It must be generated by the individual's own brain
• B. It must be reliably accessible, automatically endorsed, and previously endorsed ✓
• C. It must be stored in a digital format
• D. It must be understood by at least two people

Why: Clark and Chalmers list criteria such as easy availability (accessibility), automatic endorsement without needing to be doubted, and that the information was consciously endorsed at some earlier point, which together make the notebook function like a belief.

• A. Because the notebook is not made of neurons
• B. Because the notebook is not in Otto's visual field
• C. Because cognitive processing involves non-derived mental content, while the notebook's content derives its meaning from Otto's interpretation ✓
• D. Because the notebook cannot change over time

Why: Adams and Aizawa argue that genuine cognition involves non-derived content, whereas the notebook's marks have only derived content that depends on Otto's prior mental states, so the coupling does not make the notebook a cognitive state itself.

• A. Cognitive processes occur exclusively within the skull and brain tissue.
• B. Cognitive processes can extend beyond the brain into external objects and environmental resources when those resources play the right functional role.
• C. Cognitive processes are identical to the behavior that an organism displays.
• D. Cognitive processes are determined entirely by cultural norms rather than individual neural activity.

• A. It is merely a decorative object that Otto finds comforting but plays no cognitive role.
• B. It functions as a record of information that Otto reliably consults, similar to how Inga relies on biological memory.
• C. It is a communication device used to send messages to other people about Otto's health.
• D. It is a backup copy that Otto only uses after his biological memory has completely failed.

• A. The resource must be made of biological material similar to neurons.
• B. The resource must be accessible to others at all times.
• C. The resource must be reliably available and automatically endorsed, with information easily accessible when needed.
• D. The resource must have been created by the individual themselves.

• A. Social and cultural tools are considered irrelevant to cognition because only private thought matters.
• B. Language, writing, and cultural artifacts can serve as external scaffolds that reshape and extend cognitive abilities across groups.
• C. Culture can only affect emotions, not reasoning or memory.
• D. Social interaction always hinders cognition by introducing distractions.

• A. Ordinary objects never have cognitive roles, so the worry is misplaced.
• B. The criteria of reliability, accessibility, and endorsement limit which external resources count, so not everything qualifies.
• C. Only objects owned by the government can count as part of a mind.
• D. The concern is answered by denying that memory is involved in cognition at all.

• A. Cognitive processes are exclusively located within the skull of the individual
• B. Cognitive processes can extend beyond the brain into external objects and environmental resources ✓
• C. Cognitive processes occur only in social interactions between multiple people
• D. Cognitive processes are identical to neural firing patterns and cannot be realized elsewhere

Why: The extended mind thesis holds that under the right conditions, external artifacts such as notebooks or smartphones can function as parts of a cognitive system, so cognition is not confined to the brain.

• A. It is merely a decorative object with no cognitive function
• B. It functions like biological memory, reliably storing information Otto consults and endorses ✓
• C. It is a sensory device that only transmits information to Otto's brain
• D. It replaces Otto's memory entirely, so he no longer needs any internal beliefs

Why: Otto's notebook plays the functional role that biological memory plays for Inga, reliably providing information he trusts and acts upon, which is why Clark and Chalmers treat it as part of his belief system.

• A. The resource must be made of organic material
• B. The resource must be reliably available and automatically endorsed by the agent ✓
• C. The resource must be owned by the agent for at least ten years
• D. The resource must be understood in full technical detail by the agent

Why: Clark and Chalmers require that the resource be reliably available, easily accessible, and that the agent automatically endorses its information, much as one trusts one's own memory.

• A. External tools are always more reliable than biological memory
• B. Causal coupling between an agent and a tool does not by itself make the tool a constituent of the agent's mind ✓
• C. Only humans can have minds, so extension is impossible for any object
• D. Cognition is too complex to be studied scientifically at all

Why: Critics such as Adams and Aizawa argue that mere causal interaction between brain and tool is insufficient for constitution, so the tool being causally involved does not make it a genuine part of the cognitive process.

• A. Because such systems are always physically located inside the user's brain
• B. Because if a reliable external tool can become part of one's mind, a heavily relied-upon AI could blur the line between user and tool, complicating ideas about where the self ends ✓
• C. Because AI systems are biologically identical to human neurons
• D. Because extended mind theory applies only to tools made before the twentieth century

Why: If an external resource that is reliable, accessible, and trusted can count as part of cognition, then a deeply integrated AI could challenge conventional assumptions about personal identity and where a person's cognitive self begins and ends.