Not true. We know, for example, that dark matter interacts with ordinary matter via gravity. We know that it can bend light through gravity. We know where it clumps via the ways that it bends light. That tells us how well it interacts with itself.
We don't "know" any of that. This is your 'scientism' coming out. Some cosmologists postulate this based on an axtraordinarily small bit of data. This does not equate to "knowledge" by anyone's definition.
But we *do* know many things about it. We don't know what subatomic particles it is made from, but we do know many of its properties.
Name 5.
You seem to like that word. You also seem to like thinking that we know nothing.
The problem is (and it's getting worse these days) that the "scientism crowd" thinks that if any scientific "evidence" exist to suggest an hypothesis, then it has automatically become incontestable "knowledge". Much as you are doing, here. And this idiotic chain of thought is becoming commonplace on so many of these threads and among so many posters that I am having to try and point out the absurdity of it constantly. And mostly to no avail, because the habit of it is becoming epidemic as the cult of "scientism" is spreading.
But the simple fact that you can write your ideas on a keyboard and send them into the internet and have others respond means we do know a great deal.
This is an absurd analogy.
A quorum of top cosmologists estimated a few years ago that the sum total of all we know about the universe is about 13% of all there is to be known about it. And that figure is so small that it logically implies it's own inaccuracy in favor of an exaggerated degree. And now imagine what the likelihood is that if we were to know all that we currently do not know about the universe, how drastically our idea of it would change. And yet here you are presuming that we "know" what is and isn't possible in an area of the universe that we know virtually nothing about. And doing so "automatically" because you have adopted the atheist's religion of believing that if a scientist says he has some "objective evidence" of "X", then "X" must be true. Physicality has become their replacement God, and the "evidence of science" has become it's prophet of truth. And the true believers believe this all automatically, without skepticism or doubt. Just like their counterparts do the old God and his prophets of truth.
But, again, we *do* know some things. We know, for example, about how much there is.
No, we don't know that either. We guess. We hypothesize. We extrapolate from data that we aren't even sure relates. This is not "knowing".
We know how it is distributed. We know how well it interacts with ordinary matter and with itself. These things are not simply speculation, but are based on evidence and testing.
But evidence is not truth. And "based on" is not knowing anything. Why can't you see this? Are you that afraid of being wrong?
But they *do* interact with the universe as we understand it.
Well, actually, no. The fact that light has to bend around it implies that it does
not interact with it. That whatever this is, it does not offer itself as a medium. Implying that it does not exist by the same "rules".
If they didn't, we could not know how much of each there is. In particular, we know a fair amount about how each interacts with ordinary matter via gravity.
We don't know anything. All of what you're posting is just hypothetical speculation based on questionably relative observations that you are foolishly labeling "knowledge".
Further, if there were no interactions at all, nobody would have proposed their existence.
What you are calling "interaction" is not the proper terminology. It's just re-action, not interaction. When a wave bounces off a solid object they are not "interacting". The wave is simply re-acting to that which it cannot "interact" with. If the wave moves the object, then they are interacting. But in this instance, we have no information whatever that there is any actual interaction taking place.
But, dark matter and dark energy don't interact ordinary matter via electromagnetism (or, if they do, they do so very weakly). They don't interact via the strong or weak nuclear forces (if they did, we would be able to detect them in other ways than simply via gravity).
You need to take into account how much of the information is coming from inside your own mind, and is then effecting your conclusions. You are viewing this as if it's part of this universe, and therefor subject to all the same "rules" that you think you know to govern this universe. But so far it appears NOT to be part of this universe, nor to obey the same "rules". In which case it's anyone's guess what rules it would obey. And we don't even know, yet, what rules THIS universe obeys.