AI companions designed to develop disciplined analytical thinking as you work through the textbook.
Two AI tools designed for different stages of your learning journey
Learn disciplined thinking with guided exercises
Students and learners working through the textbook chapters who want to develop rigorous analytical thinking habits.
Apply techniques to your own data
Practitioners and professionals who have completed the book and want to apply techniques to real business problems.
A structured approach to building analytical judgment
Start with the textbook to understand concepts, techniques, and interpretation principles.
Use the Reasoning Companion in Example Mode for a guided walkthrough with detailed explanations.
Switch to Exercise Mode to practice independently. The companion challenges your reasoning with Socratic questions.
Choose the right tool for your needs
| Feature | Reasoning Companion | Modeling Sandbox |
|---|---|---|
| Primary Purpose | Learn analytical thinking | Apply to real problems |
| Data | Book datasets only | Your own uploads |
| Workflow | Strict 7-stage structure | Flexible, user-driven |
| Code Generation | No (conceptual focus) | Yes (Python) |
| Guidance Style | Socratic questioning | Direct assistance |
| Best For | Students learning the material | Practitioners applying it |
Guides and documentation to help you get started