Thank you. Being a newbie I did not want to bust into your conversation.

Sorry, I should not have addressed you. Now we have to look at haystack.

My point was purely philosophical:
The scientific noumenal world of the noted theoretical physicist Kant is to be distinguished from noumenal objects or things-in-themselves.

Kantian noumenal objects are not real in an Aristotelian sense of being discrete. Noumenal objects are indeterminate sources of complex personal sense-perception possibly leading to logical judgment.

As is typical for him, Kant plants himself in the middle as the arbitrator, drawing on the strengths of the extreme points of view. There is something out there, but it is not real until judgment says so.

Kant was a phenomenologist? — Gregory
Yes. It's been quoted by other philosophers that he was considered one of the first from his particular era... — 3017amen

Sort of, maybe? Wasn't Kant recruited by both camps?

Isn't the heart of the issue is that while some noumenal world is indisputable, noumenal objects fade in and out of existence depending on the reader? Are those objects fully out there, somewhat out there, or only in the public eye?

The idea of coherency only exists if there are prior observations of the phenomena — Pinprick

In science or in philosophy?

Kant argues that ... We apply metaphysical concepts to the world in order to make experience possible at all. In other words, synthetic a priori metaphysical concepts are the pre-conditions of all experience. Hence, Kant distinguishes between the world as [we] experience it (the world as it is experienced given the application of said concepts) and the world as it is independent of our experience. — philosophy

As Kant well understood, there is personal private experience and then there is public instrumental scientific experience. For science, it can be taken for granted that the whole purpose is to investigate a noumenal world that otherwise is a complete mystery.

The preconditions and mechanics of personal experience are a complex, as a glass seen through darkly. We cannot easily tell whether the world we recreate in our imagination when awake, or dreaming, is even close to overcoming biological and psychological limitations.

In either case, there is no reasonable alternative to some form of independent noumenal world that's out there around us.

However, we tend to believe that there is a reality, beyond the propositions, which is represented by them — Metaphysician Undercover

Propositions are merely a formality of dictionary words bundled through a simple manageable logic. They are a useful tool for the practice of formal philosophy. In and of themselves propositions represent nothing whatsoever just as mathematical symbols represent nothing beyond their own formalism.

To also add that philosophical formalisms correspond to a matching real, even material world is quite a stretch, when you think about it. It could be so, maybe or maybe not. But philosophy is in no position to then circularly derive its own primitive premises.

To justify such theories and many more speculations of its own is what science is for. Science has over the past millennium shown that nature is quite different than what the naive imagination suggests. If it wasn't so, there would be no need for science at all -- we could just ask each other how the world is and get true answers.

An antirealist is "a person who denies the existence of an objective reality". It sees "no access to a mind-independent reality, even if it exists". — Michael McMahon

Given those two choices, I can't even imagine anyone actually being an antirealist.

Realism is a useful but unnecessary philosophical fantasy. A non-philosopher can just ignore all philosophical theories and go on with their life. A philosopher can work on their own ideas without concern for such a logically restricting possible universe. There are plenty of others waiting for an unfettered fertile imagination to explore.

I've got plenty of nothing.

I've just checked and there's nothing in my pocket. Now, I have nothing to say, nothing to show, nothing to think about, nothing to do. Good thing it's a holiday here.