  In the current standard viewpoint small black holes are believed to emit
radiation as black bodies at the Hawking temperature, at least until they reach
Planck size, after which their fate is open to conjecture. A cogent argument
against the existence of remnants is that, since no evident quantum number
prevents it, black holes should radiate completely away to photons and other
ordinary stable particles and vacuum, like any unstable quantum system. Here we
argue the contrary, that the generalized uncertainty principle may prevent
their total evaporation in exactly the same way that the uncertainty principle
prevents the hydrogen atom from total collapse: the collapse is prevented, not
by symmetry, but by dynamics, as a minimum size and mass are approached.
