# Introduction to Formal Logic (2020) Textbook Available as PDF

The 2020 textbook "An Introduction to Formal Logic" has been made available as a PDF. It covers fundamental logical reasoning and argumentation concepts. This resource is valuable for students and self-learners seeking to understand formal logic.

**Importance:** 1/5

## Sources

### Technology
- [Hacker News](https://logicmatters.net/ifl/pdfs/IFL2_LM.pdf) — Sat, 25 Jul 2026 04:21:52 +0000