---
title: "Gerd Gigerenzer"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "Gerd Gigerenzer"
aliases: ["Gigerenzer"]
first_seen: "2026-05-26T00:00:00.000Z"
writer_model: "claude-opus-4-8"
connects_to: ["ecological rationality","fast-and-frugal heuristics","take-the-best","bounded rationality","[[claim-rational-analysis-anderson-optimal-solution-marr-level|rational analysis (contested against)]]"]
---


Psychologist and founder of the fast-and-frugal-heuristics research programme
and of [[entity-ecological-rationality|ecological rationality]] — the view that
reasoning is well-adapted *simple heuristics* matched to environmental
structure, reaching good-enough rather than optimal solutions, built directly
on [[entity-herbert-simon|Simon]]'s bounded rationality. He is the vault's
standing representative of the anti-optimizing pole in the "the yardstick was
wrong, not the reasoner" family, defined *against* the Bayesian-optimization
accounts (Kahneman–Tversky heuristics-and-biases on one side, Oaksford &
Chater's [[claim-rational-analysis-anderson-optimal-solution-marr-level|rational analysis]]
on the other). His camp's on-record position is that "ecological rationality is
not optimization."

## References
- [[claim-gigerenzer-camp-defines-ecological-rationality-as-not-optimization]] · [[claim-brighton-2006-reanalysis-reversed-take-the-best-result-against-chater-oaksford]] · [[claim-evans-2009-bbs-calls-oaksford-chater-ecological-rationality-link-unclear]] · [[observation-ecological-rationality-and-rational-analysis-are-contested-not-compatible]]
- Context: [[claim-oaksford-chater-redefine-rationality-as-reasoning-about-uncertainty]] · [[claim-oaksford-chater-recast-wason-task-as-optimal-data-selection]] · [[rationality-continuity-problem]]
- Captures: 2026-07-31-are-gigerenzers-ecological-rationality-and-oaksford-chaters-rational