MacM,
Unfortunately, I would say the majority of our ideas are preconceived. I am curious as to how you interpret reality and nothingness so it works with the "bifurcated nothingness concept". This theory seems ludicrous to me, just as eternal existence does to you. Asking "what caused existence?" is a ludicrous question because if something caused existence that something would, by definition, be apart of existence. See my logic?
I think people need to reinterpret certain thoughts about time, infinity, existence, and causality and they will see the logic.
"All actions presuppose the existence of entities - and all emergences of new entities presuppose the existence of entities that caused their emergence. All causality presupposes the existence of something that acts as a cause. To demand a cause for all of existence is to demand a contradiction: if the cause exists, it is part of the existence; if it does not exist, it cannot be a cause. Nothing does not exist. causality presupposes existence, existence does not presuppose causality".