- How sure this is
- 93% sureThese words were traced back to where they first appeared. That source is listed below.
- What turned up
- Letter to Booker T. Washington, April 12, 1896 ("this line of education is the key to unlock the golden door of freedom to our people")
- Sources checked
- loc.govChecked using claude-sonnet-5, 20 August 2026