Abstract
Structural models of systems of causal connections have become a common tool in the analysis of the concept of causation. In the present paper I offer a general argument to show that one of the most powerful definitions of the concept of actual cause, provided within the structural models framework, is not sufficient to grant a full account of our intuitive judgements about actual causation, so that we are still waiting for a comprehensive definition. This is done not simply by focusing on a set of case studies, but by arguing that our intuitions about two different kinds of causal patterns, i.e., overdetermination and counterdetermination, cannot be addressed using that definition.
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Notes
Thus, X = Y and Y = X are indeed different structural equations: the first one states that X has the same value of Y and the value of X is causally dependent on the value of Y, while the second equation states that X has the same value of Y and the value of Y is causally dependent on the value of X. Hence, the order of occurrence in a structural equation is crucial for distinguishing causes and effects.
The present definition is a slight modification of the original Definition 3.1 in Halpern and Pearl (2005). In Definition 1.3 only basic events are allowed as actual causes, but this limitation is only apparent. The original definition includes a further condition stating that the set of events identifying the actual cause has to be minimal; given this condition, it can be proved that such a set can only be a singleton.
Primary overdetermination is also called symmetric overdetermination.
Notice that early preemption, late preemption, and trum** preemption are all species of backup overdetermination.
A classic example of this exception is given in McDermott (1995): a man catches a cricket ball in a context in which the next things in the ball’s direction of motion are a solid brick wall and a window. In this case only few people would say that the man’s action prevented the ball hitting the window.
See Halpern and Pearl (2005): “As the examples have shown, much depends on choosing the “right” set of variables with which to model a situation, which ones to make exogenous, and which to make endogenous. While the examples have suggested some heuristics for making appropriate choices, we do not have a general theory for how to make these choices. We view this as an important direction for future research.”. See also Woodward (2003), pp. 88–91, where the subjectivity problem is faced trying to show that at least in part the subjective choice of models and worlds is based on objective facts about how the world works.
An analysis of cases of threats, as cases of causation by double prevention, is provided by Hall. See Hall (2007).
See Hall (2007), p. 120: “The family sleeps peacefully through the night, in part because the watchful police have nabbed the thief before he can enter the house”.
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Giordani, A. An Internal Limit of the Structural Analysis of Causation. Axiomathes 26, 429–450 (2016). https://doi.org/10.1007/s10516-016-9297-z
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DOI: https://doi.org/10.1007/s10516-016-9297-z