Otto has Alzheimer's and consults a notebook he carries everywhere to remember facts; Inga has a normal memory and recalls the same facts internally. Clark and Chalmers argue that Otto's notebook entry is a belief. What is the parity principle argument for this conclusion?
ABecause Otto consciously chose to write the information down, he has the same epistemic responsibility as Inga
BIf we would count Inga's internal memory state as a belief because of its functional role, then Otto's notebook entry — which plays the same functional role — should also count as a belief; location (brain vs. notebook) is not a principled distinction
CNotebooks are extensions of biological memory systems and therefore inherit their cognitive status
DBecause Otto relies on the notebook as reliably as Inga relies on memory, the two systems have identical reliability profiles, which is sufficient for belief
The parity principle says: if a process outside the head plays the same functional role as a process inside the head that we would call cognitive, then the external process should count as cognitive too. Functional role — not substrate or location — is what defines cognitive states on a functionalist account. Inga's memory state is a belief because it is available on demand, trusted without second-guessing, and guides action; Otto's notebook entry meets all the same functional conditions. Option D captures part of the argument (reliability) but misses the functionalist foundation: it's about functional role, not just reliability.
Question 2 Multiple Choice
Adams and Aizawa argue that Clark and Chalmers commit the 'coupling-constitution fallacy.' What is this fallacy?
AInferring that because minds can be extended, they must be extended in all tool-using situations
BInferring that because an external system is causally coupled to a cognitive process, it is thereby part of (constitutes) the cognitive system
CConfusing the claim that cognition depends on the environment with the claim that cognition is identical to environmental processes
DAssuming that any resource meeting Clark and Chalmers' four criteria must have genuine intentionality
The coupling-constitution fallacy is the inference from causal coupling to constitutive membership. Adams and Aizawa point out that many things are causally coupled to cognitive processes without being parts of the mind: the thermostat is coupled to room temperature but is not part of the room's temperature; a ruler is coupled to a measurement task but is not part of the cognitive system doing the measuring. Being an input to, or influence on, a cognitive process is not the same as being a constituent of it. The challenge for extended mind theorists is to specify what makes coupling 'tight enough' to cross the line into constitution.
Question 3 True / False
The extended mind thesis is committed to the claim that external items can literally constitute parts of the cognitive system — not merely that they causally support or enhance cognition.
TTrue
FFalse
Answer: True
Clark and Chalmers explicitly distinguish their thesis from the trivial observation that we use tools to help us think. A hammer extends our physical reach but is not part of our motor system; a calculator speeds up computation but (on a weaker view) is merely a tool. The extended mind thesis makes the stronger claim: that under the right conditions — meeting the four criteria of reliable availability, automatic endorsement, direct accessibility, and prior conscious endorsement — an external resource is literally a constituent of a mental state, not merely a causal contributor to it. This is the philosophically interesting and controversial claim.
Question 4 True / False
Because the parity principle is symmetric, any tool we regularly and reliably use — a hammer, a car, a GPS device — qualifies as part of our extended cognitive system under Clark and Chalmers' view.
TTrue
FFalse
Answer: False
Clark and Chalmers recognize that not every tool use constitutes cognitive extension. They propose four criteria that a resource must meet to qualify: (1) the resource must be reliably available and typically deployed; (2) information retrieved must be automatically endorsed rather than doubted; (3) the resource must be directly accessible; and (4) the information must have been consciously endorsed at some point. A hammer is reliably used but does not store or process information in a way that could constitute a belief state. A GPS you consult occasionally and then verify through other means falls short of automatic endorsement. The criteria are meant to exclude mere tool use.
Question 5 Short Answer
What are the four criteria Clark and Chalmers give for an external resource to count as a genuine cognitive component, and why do they need criteria at all — why can't they simply apply the parity principle directly to every case of tool use?
Think about your answer, then reveal below.
Model answer: The four criteria are: (1) the resource must be reliably available and typically deployed; (2) information retrieved from it is automatically endorsed rather than treated with suspicion or second-guessed; (3) the resource is directly accessible when needed; and (4) any information it contains was at some point consciously endorsed (written in, approved). They need criteria because the parity principle alone would extend too broadly — a book in a library you've never visited contains information, but you would not count it as part of your mind. The criteria mark the difference between a tightly coupled cognitive resource (Otto's notebook) and information that merely exists in the world (a library entry about the museum).
The criteria do important work, but critics note they may be ad hoc — designed to produce the result that Otto's notebook counts while the library doesn't, without independent justification for why these four conditions are the right ones. The deepest challenge is principled: what makes some coupling 'tight enough' to constitute rather than merely support? The criteria are Clark and Chalmers' answer, but whether they draw the line in the right place is exactly what the debate is about.