In The Verge article [1], they mention that it had to be a unique phrase. I could see "OK Google" causing to many false activations. [1] http://www.theverge.co

In The Verge article [1], they mention that it had to be a unique phrase. I could see "OK Google" causing to many false activations. [1] http://www.theverge.com/2013/8/1/4578890/this-is-the-moto-x http://www.theverge.com/2013/8/1/4578890/this-is-the-moto-x