Lesson 2: Eight ways to learn from raw text
32 min read·13 Oct 2026
Module 8 · Lesson 2 · About 60 minutes · Needs: Lesson 1 (the harness:compare_run,late_valid,verdict); Module 7, Lesson 1 (masks and the three shapes)
The situation
Sol 421 at Aurora Station. The harness from Lesson 1 is ready, and Maya Lindqvist asks the question it was built for: "Which way of learning from the station record gives us the best model?" Kofi Mensah repeats his terms: one budget, paired seeds, a metric every contender can be scored on.
This lesson builds eight pretraining objectives on the package and races them. The running example is Lesson 1's: document 0's first row, "Bruno Ferreira works in the water plant on the coolant loop." Every objective turns that row into a different exercise.