Definition
Plain language
Asking what would have happened if you had done something differently.
As stated in the literature
In Pearl's framework, the top rung of the ladder of causation: reasoning about outcomes under hypothetical alternative interventions.
Also called: counterfactuals, counterfactual reasoning
Why it matters: Counterfactual reasoning is what separates real causal understanding from pattern-matching on correlations.
For example, asking 'would the patient have survived if they had received the drug?' is a counterfactual question, distinct from observing survival rates among those who actually got it.
Heard on the show
“Multimodal poisoning work up to now has been predominantly text-centric — a counterfactual caption, an injected instruction, or words rendered into the page image.”Episode 247 — One Edited Photo, an Honest Caption, and a RAG System That Believes It