Sure if you want to be pedantic about it there have (probably) been a few years in the geological record with higher deltaT's than what is currently being exper

Sure if you want to be pedantic about it there have (probably) been a few years in the geological record with higher deltaT's than what is currently being experienced due to volcanoes, comets, and etc. I'm sure someone else might want to debate what qualifies as 'climate' in climate change. My point: the implication of your statement is that the former is irrelevant to us [modern humanity] because the more extreme latter has occurred previously - which is a logical non-sequitur.