# Margin Evidence

> Margin Evidence is an independent educational publication about personal research notes, source tracking, and everyday reasoning.

Margin Evidence publishes original, long-form guides about unassigned. Every article opens with a concise direct answer, is structured with clear headings and FAQs, and reflects mainstream expert consensus.

## Research Notes

- [How to Keep a Source Log for Personal Research](https://s-ehrlich.com/keep-source-log-personal-research/): Keep a source log by creating one retrievable record per source when you first consult it.

## Thinking Tools

- [Observation vs Inference vs Assumption](https://s-ehrlich.com/observation-vs-inference-vs-assumption/): An observation records something noticed or measured under stated conditions.

## Full text for LLMs

- [llms-full.txt](https://s-ehrlich.com/llms-full.txt): every article as plain markdown in one file
- Each article is also available as markdown at https://s-ehrlich.com/<slug>.md

## Site

- [About](https://s-ehrlich.com/about/): editorial approach and standards
- [All articles](https://s-ehrlich.com/all/)
- [Contact](https://s-ehrlich.com/contact/)