But you're assuming that life must contain good quantities of water, and in all 3 phases on the planet. Silicon life could definitely be a thing.. However sili

But you're assuming that life must contain good quantities of water, and in all 3 phases on the planet. Silicon life could definitely be a thing.. However silicon bonds are a lot lower energy than carbon bonds are, for most substances. (I would argue that oxygen would be toxic to silicon based beings, due to Si-O.). So, I'd theorize that silicon based living beings would have to be in an atmosphere of, say, methane. And the phasegraph of methane ( https://www.engineeringtoolbox.com/methane-d_1420.html https://www.engineeringtoolbox.com/methane-d_1420.html ) would seem to show that -175c and around there would be ideal temps for silicon life. However, if we're exclusively only looking for carbon/oxygen/water based lifeforms, then I think the 0-100c is a reasonable assumption.