>Premise: There is a kind of exotic matter that doesn't

Will be like your mother. Growing ever larger and pushing her family away at the same time.

>>8715797
I'm going to go out on a limb and say that it doesn't interact with matter. Matter reacts to matter gravitationally because <magic> and reacts electromagnetically because the constituents of matter are charged matter particles.

If you were talking about a new, non-matter substance which was not made of traditional matter, it would presumably not be electrically charged (it's not made of electrons or protons). And you've ruled out gravitational interactions by definition.

This new shit would just pass through everything and affect nothing while it did so.

>>8715809
So then it would be incapable of being perceived by us, who are made of matter. Shit, what if we're surrounded by some kind of weird pseudomatter?

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>>8715812
It wouldn't make a difference

>>8715809
Wouldn't it be just like trying to push together the two same poles of two magnets? You can easily do it with small magnets, while feeling how they repel each other, but the bigger they get the harder it'll be to get them to touch until they are so big that not even nukes could push them toward each other.

>>8715797
It'd gather in the vast voids between galaxies, doing nothing at all. If it interacted with light directly there would be shadows there, if gravitationally there'd be suspicious lensing.