As a journalist for more than 25 years, I have a lot of experience with language. But it wasn't until my daughter Sophie was born and diagnosed with Down Syndrome that I realized that freedom of speech isn't only about what you can say, but why you say it. As the editor of the National Center on Disability and Journalism's style guide, I like to share the history of language and how it's evolving. And as Sophie's mom and author of the memoir "My Heart Can't Even Believe It: A Story of Science, Love and Down Syndrome," I love to talk about what it means to be a hard-charging intellectual stopped in her tracks by a kid who may never completely grow up, but is much more than her diagnosis.