Why you would even assume your claim that "...scientists were not around or kept record of the rate of heating or cooling the earth," would have any bearing on the validity and reliability of the mountains of evidence that exist ( which include ice core samples, NASA GISS direct surface temperature analysis, CRU direct surface temperature analysis, Satellite Data,Radiosondes, Sea level rise, Borehole analysis,Proxy Reconstructions,Glacial melt observations, Sea ice melt, Permafrost melt) pointing to human emissions of climate change is elementary at best, pathological at worst.
Clearly, you are not a serious person with a serious argument. You're questions are completely idiotic and irrelevant. Your claim that "...scientists were not around or kept record of the rate of heating or cooling the earth," is even more absurd.
I've never seen or heard of a peer-reviewed article in a scientific scholarly journal argue that position. Not even the most hardened global climate skeptic would dare offer that claim. I think they would be embarrassed to.
Lastly, I think you are a bizarre person who prides himself on exhibiting a ghastly propensity to boast about approaching a debate with a closed mind.
These are your words "I don't think there's any amount of proof that I could see, that would PROVE to me, that humans have rapidly increased global warming...." Then why are you here Brian? If your mind is already made up, and you admit no amount evidence or proof will ever convince you otherwise, I ask why the hell are you here posting in this thread?