You can't say for sure it is or it isn't thinking based solely on the substrate, because it's not known for sure if consciousness is dependent on the hardware it's running on -- for a lack of a better analogy -- to manifest, if it really needs an organic brain or if it could manifest in silicon based solutions.
I agree. I'm just pointing out that the meaning of the word "think" already applied to the silicon substrate pre-ai, so just saying it's still applicable isn't that compelling.
But yeah, I am fully willing to believe that a silicon based life form could think and be alive. i just don't think we're there. Yes this thing speaks using a passable imitation of the voices of PhDs and poets, but in a way a simulated annelid is more alive.