There is a lot of controversy over the renaissance when it began and if actually exited. Why do you think there iss so much more uncertantaintt and controversy

The term "renaissance" was coined in the 19th Century and is considered more of a development of modern science rather than art and culture. Due to the disputed time of when the arts consciously moved forward and the period's characterization of a scientific progression, it seems to be uncertain and controversial as to what it truly can be defined as.