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Explainable AI

Explainable AI produces information that helps people understand an AI system's behavior for a particular purpose. It includes interpretable models and post-hoc explanations, with attention to what an explanation actually supports, who needs it and whether it faithfully reflects the system rather than merely sounding plausible.

conceptExplainability & Fairness

What it is

Different audiences need different explanations. A developer may need to diagnose a failure, an operator may need to decide when to defer and an affected person may need to understand or contest a decision. Global explanations describe broad behavior; local explanations describe a particular output. Feature attributions, examples and counterfactuals answer different questions and depend on assumptions about the data and model. For generative AI, a fluent rationale is especially easy to mistake for evidence of internal reasoning. Explanation quality therefore includes fidelity to the relevant process, usefulness to the audience and explicit recognition of what remains unknown.

What the work involves

A practitioner chooses an explanation method from the decision it must support and verifies its behavior on controlled cases. They document the reference population, perturbation assumptions and whether the method describes association or a causal intervention. User testing can establish whether the explanation improves a real judgment without encouraging overconfidence. Artifacts may include model behavior summaries, local explanation views and failure examples. The practitioner also checks that explanations do not expose confidential features or suggest actionable changes that the model would not actually respond to.

Illustrative example

A loan-support tool displays reasons for a model's recommendation. The engineer compares a local attribution plot with known feature changes and identifies that a missing-value indicator, rather than reported income itself, drives several rejections. The explanation supports a data-quality fix and a clearer review route. A generated paragraph saying income was too low would have sounded understandable while concealing the real behavior of the deployed classifier.

Limits and common mistakes

Interpretability does not establish fairness, correctness or causal validity. Local surrogates can be unstable and feature attributions depend on a baseline or treatment of correlated inputs. An explanation can be accurate yet unusable for its audience, or persuasive yet inaccurate. Quality checks should ask what decision the explanation improves and whether that improvement survives realistic cases, including errors and situations outside the model's supported domain.

Prerequisites

  • Explaining Transformer decisions (attention visualization, probing, feature attribution) requires understanding the architecture

Related skills

Sources and further reading

Last updated: 2026-10-10