that's exactly what I'm saying. understanding is good
you didn't re-invent it, you learned it from a teacher and then practiced until you understood it to the required degree
What you cannot build you do not understand.
If you can't derive a result in mathematics or physics from first principles you fundamentally do not understand it.
What you cannot build you do not understand.
If you can't derive a result in mathematics or physics from first principles you fundamentally do not understand it.