Or, failing that, pick an impressive external source and ask them to write back to you saying that, so you can subsequently quote it attributed to "Impressive Source (private communication)"

Excellent idea. I used to do this on certain assignments at times.

As a variant: Introduce some freeloader code in Watson to have it randomly blurt out quotes from a list of quotations sent to a specific email address each time it appears in public.

This gives you both the Impressive Source criterion and a public statement of the quote.