IMO, nothing is certain until we arrive at the boundary of universe creation/expansion. This is where all of the real stuff is taking place. Until then, it will be mostly theories and opinions.
Conflating theory and opinion is a bad category error. You're going to have to learn to accept that nothing outside the realm of mathematical proof is certain. Not even Cell Theory is certain.
There’s no boundary. If you live on the surface of an expanding balloon, where’s the boundary of expansion/creation? There isn’t one. It’s expanding uniformly at every point.
