Everything in this course is one loop: seed → expand → corroborate → document. Start from one selector (username, email, image), expand it into new selectors, corroborate each across independent sources, and record it with its provenance.
Lab 1 — Set up a compartmented investigation profile and confirm your public IP/identity leaks nothing.
Challenge — osint-metadata-trail (free): pull the hidden lead from a document's metadata.
Quiz — Why is one matching username only a lead? What makes an interaction "contamination"?