*DataPoint* Did Google Make a Sentient AI?

Recent news reports have come out about how a Google AI engineer in the responsible AI group claims that an AI he was working on has become sentient.

Is it true? Can we ever really know if someone or something is sentient?

Links

https://news.google.com/search?for=sentient&hl=en-US&gl=US&ceid=US%3Aen