> But if you're watching the politician speak, you can already see all of the emotion in their facial expression and body movement. Yes, but a deaf person has

> But if you're watching the politician speak, you can already see all of the emotion in their facial expression and body movement. Yes, but a deaf person has trouble hearing how the speaker is speaking. They're missing out on the emotion in the voice. Consider all of the emotion that can be conveyed in an audiobook, or on a phone call, or through music. Humans convey a lot of emotion in sound that is not represented visually. Part of sign language is conveying the emotion usually present in speech.