# Octopus Cognition Trails

> Canonical: https://octopuscognition.org/trails/

## [The Alien Mind Trail](https://octopuscognition.org/trails/alien-mind/index.md)

How evolution built complex cognition twice, on radically different neural plans.

**Guiding question:** What does intelligence look like when it is not built like us?

## [Where Does the Octopus End?](https://octopuscognition.org/trails/where-self-ends/index.md)

Arms, skin, suckers, and environment blur the boundary between brain and body.

**Guiding question:** Can a self be distributed across a body?

## [Color Without Color Vision](https://octopuscognition.org/trails/color-without-color/index.md)

A monochromatic visual system produces some of nature's richest camouflage.

**Guiding question:** How does a colorblind animal match a colorful world?

## [The Inner Life Trail](https://octopuscognition.org/trails/inner-life/index.md)

Pain, active sleep, possible dreams, personality, and the limits of inference.

**Guiding question:** What can science responsibly say about octopus experience?

## [Intelligence in Action](https://octopuscognition.org/trails/intelligence-in-action/index.md)

Tool use, learning, social behavior, play, and the controversies behind the headlines.

**Guiding question:** Which celebrated octopus abilities survive close methodological scrutiny?