I faced following sentences:


  Unlike the co-ordinate singularity at $r = 2M$, the origin of the Schwarzschild metric $r = 0$ has a true curvature singularity. It was first believed that this singularity was an artifact of spherical symmetry and that a generic collapse would evade the singularity. However, work by Hawking and Penrose showed that this was not so and that singularities were generic rather than special. The ubiquity of singularities is guaranteed by the singularity theorems by Hawking and Penrose.


Question1: What is the meaning of "generic collapse"?

Question2: When is a singularity an artifact of spherical symmetry?


Question: How to drill the perfect hole in a kitchen cabinet drawer for a handle?
Answer: One way to avoid splintering the front of the drawer is to clamp a small piece of wood on top of the area to be drilled, and drill through that bit of wood, into the front of the drawer.

This should (if you have the clamp firm) prevent any sparring or splintering on the finished surface of the cabinet drawer.

Try it on an inconspicuous area first (like a drawer near the floor or ceiling) to be sure it will work.

Another option is to try using a brad point drill bit (like one of these). They usually create a cleaner hole than standard bits.