Counterfactual Reasoning
Updated 2026-08-11
INTRODUCTION
English translation pending.
CORE DEFINITION
Counterfactual reasoning in its formal form asks what would have occurred had the cause been absent, and it is the core tool of causal identification: the effect of a treatment is the difference between the observed outcome and the potential outcome that would have been realized without it. Since that counterfactual is never observed, estimation proceeds by constructing a comparison group, through randomization, matching, or instrumental variables, that stands in for it, which is why a correlation without such a comparison cannot support a causal claim.
SCAFFOLDING EFFECT
Reduce cognitive load
- State the treatment and outcome: name precisely what was done and what is measured. - Build the counterfactual: construct a comparison group standing in for the untreated state. - Read the limit: state what the unobserved confounding still conceals.
Anchor fast decisions
A causal effect is defined as a difference between two states of which only one can be observed, so the missing state must be approximated by a comparable unit. The quality of that approximation is the quality of the causal claim, which is why the method's rigor lives in the construction of the comparison rather than in the size of the observed difference.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Counterfactual_thinkingverified
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