When he discovered the presumed sentience, he brought it up with the correct authority at Google. They told him there was no ghost in the machine and he didn't

When he discovered the presumed sentience, he brought it up with the correct authority at Google. They told him there was no ghost in the machine and he didn't like that, so he broadcast a message to 200 engineers, breaking confidentiality. Thus, he was fired. I imagine Google doesn't like loose lips about its state-of-the-art AI. Especially if it's convincing enough to prompt discussion of sentience and AI rights.