While there is a mathematical definition, there are uses of the term exactly described by you. For example, the Edge of Chaos (https://en.wikipedia.org/wiki/Edg

While there is a mathematical definition, there are uses of the term exactly described by you. For example, the Edge of Chaos (https://en.wikipedia.org/wiki/Edge_of_chaos https://en.wikipedia.org/wiki/Edge_of_chaos) has a mathematical definition, but has been used in many additional areas because it so clearly seems to describe what happens as systems become so complex that they become effectively chaotic to a human's ability to order them. This edge can shift as tools improve and push back this edge.