The quote in the title is attributed to Socrates and it used by Anti-vaxers and other peddlers of disinformation. Snopes.com looked into the origin of the quote and was only able to trace it online to a post on the Goodreads.com website from 2008. I went to that page and there is no information provided on where the poster (Or even who the poster was.) got it from (They could equally have made it up from the whole cloth.), the goodreads page has no means of commenting on the quote other than to 'like it'. Here is the link to the Goodreads.com page, which just contains the quote itself. https://www.goodreads.com/quotes/48955-when-the-debate-is-lost-slander-becomes-the-tool-of?page=5 Here is the link to the snopes.com article. I'm wondering if this is a case like the Einstein quote ("It’s become appallingly clear that our technology has surpassed our humanity.") that originated in the 1995 film Powder, something that was created for a film or other pop culture item. Searching this one online is tricky, but I'd love to find a pre-2008 source if one exists.