Could you live without brain?

We heard many about function replacing of brain parts by other but could anyone live without brain or whole part? As far as I live and study answer was “no”, but today I found a case about 3 yo Chase Britton. He was born without cerebellum and pons. He is walking, smiling and many more. Two years ago my friend introduced me on case where girl had only little part of cortex and huge ventricles pushing this cortex abroad. But this case seems to be different. How could you stand without cerebellum? How could you breathe without bridge?

Here you can find more about young boy:

And here is an image of brain which I mentioned: