Counterfactual Reasoning
Overview
Counterfactual reasoning asks what would have happened if an action, event, or condition had been different, supporting causal explanation, prediction, and decision-making. Common approaches use structural causal models and intervention graphs, potential-outcome methods, counterfactual explanations and recourse, or executable world models that simulate changes over time. Applications range from clinical treatment and network diagnosis to robotics and language models, with evaluations using synthetic causal systems, physical-video benchmarks such as CLEVRER, and tests of tabular or multi-hop reasoning. A central challenge is that observational data may not identify counterfactual outcomes, while fluent model-generated explanations can still violate causal structure or temporal constraints.
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