Well, reality is really only what the common mind interprets.
(or, it might as well be)
So, considering that nowadays MOST people believe the earth is round and revolving
around the sun,
we're pretty sure that's right, right?
And in the thirteenth century, when the earth was square and the whole goddamn
UNIVERSE was revolving around the earth,
that might as well have been true 'cos if you disagreed you were gonna get killed.
So we tell what reality is by what most of the trained minds think right now.