If A is in error, does it mean A is completely wrong, or an incomplete theory? If A is wrong, does it automatically prove alternative B?

Logically, no. The disproof of A, does not prove B.

However, we have two sets of "universal laws"
Those that are taught now - Einstein materialistic physics
And those that were taught long ago - Tesla Aether physics.

What we find is that what is taught now is wrong, completely wrong, and furthermore designed to keep people from ever looking in the correct direction.

So, in this instance, to find the real laws of the universe, we have to look exactly opposite of what modern materialistic science says.

Or, A is wrong, and thus B is correct. (since A and B are opposites)