I first came across this example in an article about the famous Texas criminal defense lawyer Richard "Racehorse" Haynes. This is the version he tells: Haynes

I first came across this example in an article about the famous Texas criminal defense lawyer Richard "Racehorse" Haynes. This is the version he tells: Haynes loves discussing his cases to teach young lawyers about trial practice. In 1978, he told attendees at an ABA meeting in New York City that attorneys too often limit their strategic defense options in court. When evidence inevitably surfaces that contradicts the defense’s position, lawyers need to have a backup plan. “Say you sue me because you say my dog bit you,” he told the audience. “Well, now this is my defense: My dog doesn’t bite. And second, in the alternative, my dog was tied up that night. And third, I don’t believe you really got bit.” His final defense, he said, would be: “I don’t have a dog.” http://www.abajournal.com/magazine/article/richard_racehorse_haynes http://www.abajournal.com/magazine/article/richard_racehorse... ps. I noticed that the article uses the odd phrase "Doggy-Dog World" instead of the more standard "Dog-Eat-Dog World". I thought at first this was just a non-Enlish speaker's mistake, but apparently the corruption has more history than that: https://english.stackexchange.com/questions/148120/where-did-doggy-dog-world-come-from https://english.stackexchange.com/questions/148120/where-did...