Right and the question is still largely irrelevant to his point being that humans affect climate change.He didn't ask him to predict anything.
Nye made an unsubstantiated claim, humans are the cause 100% of global warming, he asked him if that is the case what would the temperature be like if human weren't here, even if Nye believed what he was saying the only scientific answer would have been we don't know too many variables to account for, but to then claim it would be like 1750 is wrong, and to say well england wouldn't be able to grow grapes for wine because they wouldn't be wine quality is even more unscientific because there is no scientific standard of wine quality. To say anything except present a scientific model that is universally agreed upon is dodging the question.
Do you agree or disagree that humans affect climate change?