When the conversation turned to global warming during the first presidential debate Monday, Donald Trump was quickly disproved by Donald Trump's Twitter account. CBS News reports Hillary Clinton claimed Trump called global warming a Chinese hoax. "I did not," Vox quotes Trump's response. "I do not say that." The internet quickly showed otherwise. "The concept of global warming was created by and for the Chinese in order to make US manufacturing non-competitive," Trump tweeted in 2012. As for Clinton's thoughts on global warming being a hoax: "I think it's real." (More presidential debate stories.)