“Plato imagines a group of people who have lived chained in a cave all of their lives, facing a blank wall. The people watch shadows projected on the wall by things passing in front of a fire behind them, and begin to ascribe forms to these shadows. According to Plato, the shadows are as close as the prisoners get to seeing reality. He then explains how the philosopher is like a prisoner who is freed from the cave and comes to understand that the shadows on the wall are not constitutive of reality at all, as he can perceive the true form of reality rather than the mere shadows seen by the prisoners.” – Wikipedia
Impressive dude, specially when you consider that his p-truth was that the elements were earth, wind, fire and water. How many p-truths have there been since then? 118 as of last count, and I’m sure there will be more. The present periodic table is not TRUTH, it is only the most recent p-truth. (best answer to date) Throughout history every TRUTH has proven to be an n-truth, and always will be I suspect.
As to the cave; in reality that is all we can see, the shadows on the wall. Like radio waves, there is something there but we can’t see it. Yet the radio works. Like vectors (vibrations) in the 4th dimension. There is SOMETHING there but we can’t see it. Yet the universe exists.
The Scientific Method precludes us ever finding out.
Letters to DrB>Here