Yes, like I acknoweldged the study does state that CO2 increase preceded temp increase. 400,000 years ago...when man was in no way, shape, or form a contributing force. However what must be reasoned from this is that there are natural fluctuations in the global climate BUT it is important to recognize other scientific phenomena, such as the Greenhouse Effect and all the plethora of indicators that show man's impact on global climate since industrialization. You're looking at one piece of data and coming to a conclusion based on that. One argument in your favor. You fail to look at all the other scientific evidence pointing to global climate change being significantly impacted by humanity.