A physicalist claims that mental facts are grounded in physical facts. What does this claim add that 'mental facts supervene on physical facts' does not?
AThe grounding claim adds that mental facts are identical to physical facts, whereas supervenience allows them to be distinct
BThe grounding claim asserts that physical facts are explanatorily prior — mental facts obtain because of physical facts — whereas supervenience only asserts co-variation without explanation or direction
CThe grounding claim is weaker than supervenience, applying only to some mental facts while supervenience applies to all
DGrounding and supervenience are equivalent; the distinction is merely terminological
Supervenience says mental facts can't differ without physical facts differing — a correlation. But you could have systematic supervenience with no explanatory relation (both might depend on a third thing, or it might be brute coincidence). Grounding asserts asymmetric explanatory priority: the physical facts are why the mental facts hold. This directional, 'in virtue of' content is exactly what supervenience lacks and what physicalists actually mean to claim.
Question 2 Multiple Choice
The grounding relation is irreflexive, asymmetric, and transitive. Which scenario would violate these formal properties?
AThe fact that a surface is red is grounded in facts about its surface molecules and how they interact with light
BMoral fact F is grounded in natural fact N, and N is grounded in microphysical fact M, so F is also grounded in M (by transitivity)
CThe fact that water is liquid is grounded in its molecular arrangement, and the molecular arrangement is partly grounded in the fact that the water is liquid
DMathematical facts are not grounded in physical facts, forming an independent hierarchy
Scenario C creates a grounding circle: if A grounds B and B grounds A, the relation is symmetric — violating asymmetry. By transitivity, if liquidity grounds the arrangement and the arrangement grounds liquidity, then liquidity would ground itself — violating irreflexivity. Grounding must be a strict partial ordering (irreflexive, asymmetric, transitive) to make the concept of a hierarchy of metaphysical priority coherent.
Question 3 True / False
If a fact is grounded in another fact, the grounded fact is less real or merely apparent — it has diminished ontological status compared to the fundamental fact that grounds it.
TTrue
FFalse
Answer: False
This is a central misconception about grounding. Grounded facts are fully real — grounding is not an ontological demotion. The fact that a surface is red is fully real even if it is grounded in facts about wavelengths and neural responses. Grounding describes priority within reality, not degrees of reality. The physical facts being more fundamental than mental facts doesn't make mental facts illusory — it just tells us which facts depend on which.
Question 4 True / False
Grounding is distinct from causation because grounding is a synchronic, constitutive relation while causation is a diachronic, productive one.
TTrue
FFalse
Answer: True
Causation is temporal: the cause precedes the effect and produces it over time. Grounding is not temporal: the molecular arrangement of water doesn't cause it to be liquid at some later time — the liquidity obtains simultaneously, constituted by the arrangement. You can ask 'what caused the fire?' but grounding asks 'what is the fire's existence in virtue of?' — a different question entirely. This distinction explains why physicalism is not a causal thesis and why grounding counts as metaphysical, not natural, explanation.
Question 5 Short Answer
Why do philosophers introduce the concept of grounding rather than relying on supervenience to capture 'in virtue of' relations like physicalism?
Think about your answer, then reveal below.
Model answer: Supervenience only captures co-variation: if mental facts supervene on physical facts, the two can't come apart. But supervenience is compatible with the mental and physical co-varying for any reason — both depending on a third thing, or through brute necessity with no explanatory relation. Grounding adds directionality and explanation: the physical facts are prior, and the mental facts hold because of them. This 'because of' is what physicalists actually mean — not just that they co-vary, but that the physical level explains and determines the mental level. Grounding makes this explanatory priority formal and tractable.
The philosophical payoff of grounding over supervenience is exactly this explanatory content. Many debates in philosophy of mind, ethics, and mathematics are really debates about what grounds what — supervenience alone is too weak to capture the claim being made.