What does any of this have to do with pendulums? I can honestly say, I've never seen a mod so active in derailing thread after thread with non-sequitors. It appears to be your M.O., jroa.
I believe before the derailment about electromagnets, psychology and laser/radio/radar moon bounces, RE's were attempting to explain that pendulums can be made without electromagents and that they all show, depending on their latitude, mathematically predictable rotations, which should rule out any errors in the setup.
Do you FE's have any coherent response to this? How is it pendulums can be shown to have mathematically predictable rotations at different latitudes? For the sake of clarity, let us just take the examples shown by pendulums that do not use any electromagnets.
The pendulum swings in a straight plane, and we know there is no force available to make the pendulum rotate (no magnets, remember!), then it must be the earth that spins underneath it.