On Sun, 7 Oct 2018 13:21:13 -0700 (PDT), Quadibloc
wrote:

On Sunday, October 7, 2018 at 7:58:08 AM UTC-6, Chris L Peterson wrote:
GR is easy to understand.

For a certain value of "understand". Tensor calculus isn't easy.

Sure. The techniques for manipulating the numbers can be tricky
(although trivially handled by software tools these days). But the
underlying concepts are accessible to anyone with a reasonably normal
level of intelligence.