Reply #17: eh, people muscle test themselves all the time

[Celebration]

It can be done various ways. As stated below, a pendulum could be used. Or you could use your body as a pendulum, and sway one way for yes, and another way for no.

But there are lots of finger testing techniques that can be used. Or, if one can do regular muscle testing, you could test through a surrogate, someone else taking on your energy.