The discussion revolves around the characterization of black holes, specifically whether mass, angular momentum, and charge are sufficient for their description, or if additional factors such as entropy and surface area should also be considered. The scope includes theoretical aspects and implications of the no-hair theorem.
Participants express differing views on the sufficiency of mass, angular momentum, and charge for black hole characterization, indicating that multiple competing perspectives remain without a clear consensus.
There are unresolved questions regarding the necessity of including entropy and surface area in the characterization of black holes, as well as the implications of the no-hair theorem in practical scenarios.
For real, astrophysical black-holes -- the charge can be assumed to be zero, as a black-hole will be formed from (ridiculously close to) equal numbers of protons and electrons. But all three parameters are actually needed for a complete description, as Nabeshin said---according to the http://en.wikipedia.org/wiki/No_hair_theorem"phinds said:From all the reading I've done, I gather that the mass and spin are the properties that matter.