I disagree a little bit. I think life is only possible within a narrow range of conditions, such as our own. It requires information to be stored and copied billions of times over. Carbon molecules can do that, but probably nothing else in this universe, the physical laws being what they are.
It’s arrogant to think that only life as we know it or can imagine it can survive, replicate and store their history. Government won’t tell us if we’ve been visited by aliens. There’s no way to know if life exists not based on carbon, and that doesn’t mean that it can’t exist that way either.