This is trivially falsifiable by a simple google search - "ice core resolution". You may want to reassess the general trustworthiness of your information source

This is trivially falsifiable by a simple google search - "ice core resolution". You may want to reassess the general trustworthiness of your information sources. Incidentally, the evidence for AGW, and indeed geologically sudden climate change without precedent, goes far beyond ice cores. Very little in science in predicated on lone observations that can't be cross checked. We have a wide variety of information sources that all paint a coherent picture: https://en.wikipedia.org/wiki/Global_temperature_record https://en.wikipedia.org/wiki/Global_temperature_record Measuring historical temperatures is not unlike measuring distance. We know, for instance, that the Andromeda galaxy is 2.537 million light years away. How can we possibly make such a precise assertion so confidently? We started by measuring small, earthly distances, and used those to triangulate larger ones. We worked our way up the distance scale by a series of inferences. Thus, we built up a model of how things look at various distances. It's more or less the same type of methodology - yet mysteriously, the anti-AGW pundits don't seem to have a problem with that. https://en.wikipedia.org/wiki/Cosmic_distance_ladder https://en.wikipedia.org/wiki/Cosmic_distance_ladder Climate scientists, believe it or not, know what they're doing. It is the height of arrogance to flippantly dismiss their efforts simply because you personally don't understand them, because you can't be bothered to research even basic things like the resolution of ice core data.