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The Two-Mark System

The two-mark system is the bookkeeping convention that runs through the whole framework: every load-bearing claim is tagged with two independent labels at once — one saying how the claim is held (its epistemic mark) and one saying how accurately it maps reality (its alethic mark) — and the two labels are never allowed to bleed into each other. In plain terms, it forces the writer to answer two separate questions about every claim, and never to let the answer to one quietly substitute for the answer to the other.

The convention exists because those two questions are genuinely different, and confusing them is the most common way to misread the entire framework.

The two marks

For each load-bearing claim:

E — the epistemic mark. Always Derived, placed at one of three tiers on the contestability gradient: FT (frame-internal / tautological — contestable only by declining the frame; least exposed, not merely optional); CV (carving / count / aptness — contestable by counter-instance); AC (authority-canonical — contestable by contesting the authority; canonical ≠ necessary).
A — the alethic mark. The claim's mapping-accuracy aspiration on the alethic axis: the degree and manner in which it claims to participate in the world it cannot exhaust.

A claim might read, for instance, E: Derived, AC · A: aspires to map the actual structure of access, falsifiable in principle. The two marks are kept side by side precisely so that neither is read off the other.

The cardinal prohibition

The single most important rule the system enforces: "contestable" must never be read as "probably wrong" or "merely optional." That misreading — collapsing the E mark into the A mark — is the exact failure the whole apparatus exists to prevent. Because the two axes measure different things, a claim can sit at the most-exposed epistemic tier and aspire to (and reach) maximal accuracy with no tension at all. (By analogy, a courtroom verdict can be both formally appealable — open to challenge at every level — and, as a matter of fact, exactly right; "appealable" and "wrong" are simply different properties.) The alethic axis page works the gravity-the-law and the primes examples that make this vivid.

The one exception: glosses

There is a single exception to the two-marks rule: exposition that makes no claim of its own. The phenomenological glosses — see the human gloss — carry no probative weight, so instead of asserting an alethic mark they inherit the accuracy of the formal claim they point at. A gloss is flagged as such wherever it occurs; it is a finger pointing at the moon, marked "this is a finger, not the moon." Everything other than such pointing-only exposition takes both marks.

What the deflation keeps

It is worth being precise about what the move to single-status throws away and what it keeps. The deflation from "forced" to "Derived" removes only the foundation-and-possession pretension on the epistemic side. It leaves the mirror — the accuracy aspiration on the alethic side — entirely intact. The framework's own summary: "We give up owning the territory; we keep drawing it as truly as we can." This is why the two marks must stay separate columns: deflating one was never meant to deflate the other, and a reader who collapses them would mistake honest openness for retreat from accuracy.

Role in the wider framework

The two-mark system is the engine room of the framework's whole epistemic discipline. It is held as a standing ledger — see the two-axis ledger — and its refutation conditions are spelled out claim-by-claim in the kill-table. It is the convention through which the single Derived status and the semblance, not possession ceiling are operationalized on every page. Without it, "everything is Derived" would indeed sound like "everything is shaky"; with it, sturdiness and accuracy each get their own honest accounting.

Common misreadings

Collapsing E into A — reading "contestable" as "wrong" or "optional." This is the precise error the system forbids.
Thinking the two marks predict each other. They do not; the columns are independent by design (see the two-axis ledger).
Treating glosses as ordinary marked claims. They are the sole exception: they inherit accuracy, never assert it.

Formal status. Preamble (Part 0a). Exposition / structural rule — the two-mark system is the convention by which load-bearing claims receive their E and A marks; it is not itself a marked world-claim. (Glosses are its named exception: they inherit, never assert, an alethic mark.) Provenance: canonical — the two-mark marking discipline the benchmark requires.