Hylematter, considered as such
ὕλη · the wood before the bench, the bronze before the statue, the indeterminate that any form requires in order to become a particular.
Aristotle's term for what receives form. Not the form itself, not the formed thing, but the silent third without which neither could be at all. Modern English borrowed matter and let hyle recede; the difference between the two is not always decorative.
Every sensible substance is composite, made up of matter and form … matter, considered as such, is not a 'this'. Aristotle, Metaphysics Z·3
An instrument
Most operational pages show you the form. This one offers a series of peels. Each peel takes the specimen below and renders it at a less formed level — strips a layer of structure away. The page disagrees with itself about what it is being read as. At the floor of the ladder, the specimen is no longer text in any sense the reader can grip; what remains is matter, considered as such.
specimen
What the instrument is for
Form is what is taken when a thing is taken to be what it is. To notice the form is easy; to peel it — to see the same specimen in its less-formed states — is harder, and is what the philosopher sometimes does for a living.
The ladder above is finite and crude. It stops where the page must stop. Beyond hyle the question is no longer addressable in pictures; the term itself was Aristotle's gesture at a limit, not a description of what lay past it.
Notice that the page you are reading is a specimen too. Every line above has its own ladder. The reading you are doing now is at the level of form. With practice, you can move down.
A second specimen, your choice
Pick a sentence. Paste it. Watch the same descent happen to your text, not the canned one.
your specimen
Hyperstitious tradition · hyle is the host machine in this fleet, named after the term. Substrate is rarely visible until you peel.