Metaphysical causation: SMM/DTT and interventionist causality

01Grounding and controlled difference

A claim that every event depends on one source is global. A causal claim that changing X changes Y is contrastive: it compares alternatives under specified conditions. Woodward’s interventionist approach makes this contrast central. The intervention need not be practically possible in a laboratory, but it must isolate the relevant dependence rather than merely change a correlated variable. SMM/DTT can use this standard to distinguish an overarching metaphysical ground from the effective causes within its generated world. ^{[1] [2]}

02What the SMM/DTT distinction contributes

SMM begins with one nonspatial generative source. DTT distinguishes its inner production from the outer order in which completed results become accessible. The six inner levels are nested functional dependencies within that production; the seventh denotes outer completion. They are not six independent clocks, six spatial directions, or six simultaneously occupied temporal axes. This distinction makes the framework more specific than a general claim that everything changes: it asks how a world of persistent relations can be generated before its spatial representation is taken for granted.

The claim that reality has one source does not abolish the problem of plurality; it relocates it. SMM proposes that spatially distinct things arise through the activity of a nonspatial Single Monad. The philosophical strength of this move is that common origin can explain why different objects belong to one connected world. Its central task is individuation: why do the resulting differences amount to several objects, several perspectives or several experiences, rather than merely several descriptions of one undifferentiated entity?

Several forms of unity must be distinguished. Numerical unity says there is one fundamental being. Unity of kind says that many things share one basic nature. Structural unity says that relations form one coherent system. Experiential unity says that a group of contents belongs to one subject. These claims do not entail one another. A connected graph can represent many independent observers; one physical system can contain several informationally separated subsystems. DTT’s single source therefore becomes an explanation of multiplicity only when the construction specifies which relations individuate its outputs. ^[3]

03A complete confounding example

Let an unobserved binary source variable S be equally likely to be zero or one, and define X = S and Y = S. Observationally, X and Y agree perfectly. Yet replacing the equation for X by an intervention setting X = 1 leaves Y determined by S, so Y remains one only half the time. The correlation arose from common cause, not an effect of X on Y. A single source can therefore create perfect agreement without establishing a local causal arrow between its outputs. This is directly relevant to SMM’s unity claim.

04What source dynamics must add

A physical DTT model should identify which interventions on generated systems correspond to permitted changes in the source description. If every intervention is declared impossible because all things share one origin, the model loses the ability to explain ordinary experimental differences. If interventions are allowed arbitrarily without a source mapping, the common origin does no causal work. The useful middle ground derives a family of effective interventions and their consequences from the same update and readout. The six nested levels can constrain that family through their actual dependencies.

05A stronger relation between metaphysics and physics

Metaphysical causation need not compete with every local mechanism. It can concern the dependence of the whole causal order, while physical explanations concern differences within that order. SMM/DTT becomes stronger when it shows how the latter arise from the former under explicit assumptions. The result would preserve local agency, scientific manipulation and reliable prediction without abandoning source unity. It also clarifies scope: asserting a source of all events does not specify which counterfactuals are physically possible or their quantitative outcomes.

06A further conceptual benchmark

Imagine one computer producing two independently accessible virtual notebooks. One author can edit the first without changing the second; the notebooks retain different histories and expose different information. A common physical source is compatible with distinct functional identities. It does not follow that either notebook has experience, or that the computer is a universal subject. The example separates three inferences often compressed into unity: common production, independently addressable outputs, and phenomenal subjecthood. SMM/DTT can employ the first as its foundation while building a detailed account of the second. A transition to the third would require an additional theory of experience, rather than a change in terminology.

THE SAME QUESTION, DIFFERENT STARTING POINTS

The comparison at a glance

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