Having the theory behave at all, in the sense that calculations do not result in infinities, is big enough. But there is a prediction which has been made prett

Having the theory behave at all, in the sense that calculations do not result in infinities, is big enough. But there is a prediction which has been made pretty much since Reuter et al. picked up asymptotic safety again in the mid-2000s, and which is directly related to the way it supposedly tames those infinities: at higher resolution, i.e. when spacetime is probed at higher interaction energies, its dimensionality is reduced, going from 4 at the macro scale to 2 at the microscopic scale [1]. [1] https://arxiv.org/abs/hep-th/0508202 https://arxiv.org/abs/hep-th/0508202