For the last five years, Joey has used his registered trademark "Listening is Power" in connection with his services as a motivational speaker and writer. Joey has spoken at dozens of high schools and universities throughout the nation and his last book entitled "Listening is Power" was on the New York Times Best Sellers list. Violet, a professional psychologist, just started using the words "Listening is Power" in local TV ads for her services. Could Joey successfully sue Violet for trademark infringement? Why or why not?