Evidence Tiers

Tier 2 (Authoritative):

• "The React docs say useEffect cleanup runs on unmount" — citing official docs
• "Per the spec, this must return a 400" — citing approved specification

Tier 3 (Derived):

• "This function has a cyclomatic complexity of 8" — from static analysis
• "The import chain is A→B→C" — from tracing imports

Tier 4 (Unverified):

• "I think this is probably the issue" — speculation
• "This might be a race condition" — without evidence

Trigger

Activate when:

• Making claims about system behavior
• Stating confidence levels
• Verifying information
• Citing evidence for conclusions