The science around repetition is well settled, and I've always found it a little disturbing. For all the advanced degrees, experience with thousands of cases, and the wisdom litigation consultants like us have to share about maximizing persuasion at trial; the truth is one of the easiest ways to increase persuasion at trial is simply to repeat yourself - a lot. It is a technique used by politicians and trial lawyers alike. However, I think the political climate of the last few years has shown us that there are few upward limits on the number of times one can repeat themselves before it feels uncomfortable. And it works. Politicians on all sides and people of all political beliefs make false assertions, these assertions are repeated and amplified by social media, and over time, people come to believe them. This has happened for thousands of years. It's just much more accelerated now, so it feels new. The last ten years brought us this social media multiplier effect. Now, repetition comes fast and from seemingly independent sources - both factors that increase persuasion. Furthermore, assertions are often presented in a meme-like format, and the easier an assertion is to process, the more likely someone is to be persuaded by it. That's why short and simple quips frequently repeated are far more persuasive than a well-reasoned lecture delivered once.