@JessTheUnstill thanks, TIL, I may have used one or both of those incorrectly in the past.
and since I always feel like I need to lighten the mood somehow, if we meet a silicon based life form would they still be 'biological' by definition or just chemistry and physics
@mav
Well, taxonomy of biology is a notoriously tricky and complicated problem. For one thing, we don't even really agree on what is "alive". But biological generally is by definition going to require stuff built around carbon based organic chemistry.