> Throughout the vast majority of geological history, CO2 has been a lagging indicator, not a leading indicator,
This directly contradicts another opinion upthread:
> The proxies we have for ancient periods don't allow us to state very much about what rates of warming looked like
although that was from the person that incorrectly, although confidently, claimed:
> the CO2-driving argument is predicated on null-warming in the 1800s
They do seem confused about multiple causes, effects, etc.