Even months after launch I’m still pretty amazed that I can tell the iPhone 4S to schedule an appointment for me just by saying the words aloud to Siri. She can even tell me if there’s a conflict so I can suggest an alternate time. But I probably wouldn’t talk to her if it were not for the Raise to Speak feature. You can activate Apple’s voice-controlled assistant just by holding the iPhone 4S up to your head. If you’re going to have frequent conversations with something that’s not a real person, it’s best to do it as quickly as possible.