# Why can’t Copilot or plain RAG answer enterprise architecture questions?

> Canonical: https://decisionpen.com/docs/why-not-copilot-or-rag  
> Markdown mirror for agents · DecisionPen Docs

## Summary

ChatGPT, Copilot, and document RAG retrieve text. They do not enforce applications, capabilities, integrations, or curated relationships — so answers can invent topology and miss blast radius.

## Metamodel-aware means

The agent understands entity types and relationships, proposes updates against the schema, binds evidence, and answers from a curated map.

## How DecisionPen helps

Enterprise Ask and modelling agents run inside an Architecture Decision Workspace — structure + evidence + human curation — not token similarity alone.

## FAQ

**Why is RAG not enough?** No governed landscape state.  
**What is metamodel-aware?** Schema-respecting proposals and answers with evidence.