> For the complete documentation index, see [llms.txt](https://www.designreference.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.designreference.xyz/cognitive-tools/overview.md).

# Overview

## Cognitive Tools

Great minds across all professions have dedicated time and effort to formulating theories, laws, and frameworks designed to assist others. This area serves as an access point to that expertise relating to product design, divided into two parts.

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td><h4>UX Laws &#x26; Principles</h4></td><td>Essential cognitive laws, principles, mental models and guides for the entire product design lifecycle.</td><td><a href="/pages/7Ifc61cVlN3raNS7Qylx">/pages/7Ifc61cVlN3raNS7Qylx</a></td><td><a href="/files/RqEy2aCjWyIx5q2T0Svs">/files/RqEy2aCjWyIx5q2T0Svs</a></td></tr><tr><td><h4>Universal Principles</h4></td><td>A broader cognitive toolkit for topics such as prioritisation, problem-solving, decision-making, and people management.</td><td><a href="/pages/jR168kOoAbC0hUAjDhni">/pages/jR168kOoAbC0hUAjDhni</a></td><td><a href="/files/fzZrDHpiu7fkxrQKeMD0">/files/fzZrDHpiu7fkxrQKeMD0</a></td></tr></tbody></table>


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