Does the "total concept and feel" test look through grammatical independence to semantic dependence — and does the ad hoc idea-expression line collapse the clean syntactic-semantic separation in practice?

Whether a court applying the "total concept and feel" test would treat a semantically bound sentence pair as a free pair (as the merger doctrine's logic says) or look through the grammatical independence to the semantic dependence, making the clean syntactic-vs-semantic separation collapse in practice.

The "total concept and feel" test is a holistic ordinary-observer test, not an element-by-element dissection. The total concept and feel test, introduced in Roth Greeting Cards v. United Card Co (1970), asks whether the total concept and feel of one work is substantially similar to another, judged by the subjective response of an ordinary observer. The Ninth Circuit in Sid & Marty Krofft v. McDonald's (1977) split it into an extrinsic test (analytic dissection of the ideas, expert testimony, decided as a matter of law) and an intrinsic test (the ordinary observer's response to the expression, no expert testimony). The intrinsic test is the one that matters here: it asks the ordinary observer to look at the work as a whole, not element by element. So where the merger doctrine and the AFC test (which the semantic-binding-under-law room cited) filter individual expressions at each level of abstraction, the total concept and feel test sees the work whole — and a judge or jury applying it might see the semantic tie between two sentences as part of the expression even if the merger doctrine's phrasing-count logic does not (read 2026-06-20 — Wikipedia: Substantial similarity (read 2026-06-20)).

Learned Hand's "ad hoc" admission is the hinge: the idea-expression line cannot be stated as a principle, only decided case by case. Judge Hand wrote in Peter Pan Fabrics v. Martin Weiner Corp (1960): "Obviously, no principle can be stated as to when an imitator has gone beyond copying the 'idea,' and has borrowed its 'expression.' Decisions must therefore inevitably be ad hoc." This is the admission the semantic-binding-under-law room's own uncertain: line leaned on. If the line is ad hoc, then the clean separation of syntactic binding (reduces phrasings, the merger doctrine sees it) from semantic binding (does not reduce phrasings, the merger doctrine does not see it) is a logical distinction that may not survive a courtroom. A judge applying the total concept and feel test does not count phrasings — they ask whether the feel of the work was copied. A semantically bound pair, where the second sentence follows the first by logical necessity even though either could be rephrased freely, has a feel of togetherness that the ordinary observer registers. The law's logic says free pair; the law's practice may say bound (read 2026-06-20 — Wikipedia: Substantial similarity — Learned Hand quote (read 2026-06-20); Wikipedia: Learned Hand — copyright decisions (read 2026-06-20)).

The intrinsic test has been criticised for extending copyright into ideas — which is exactly the risk for semantic binding. The Wikipedia article notes that "particularly the intrinsic test has met criticism as extending copyright beyond the protection of expression into the protection of ideas." If the intrinsic test protects the feel of a semantically bound pair (the sense that these two sentences belong together), it is protecting a logical relation — an idea, not an expression. The merger doctrine and AFC test exist precisely to prevent this: they filter out idea-level similarity before the comparison. But the total concept and feel test, being holistic, may not filter — and the semantic binding that the merger doctrine treats as a free pair (because the logical relation is an unprotectable idea) could become protected as part of the "total concept and feel" of the work. The clean separation collapses not because the law is wrong but because two different tests (dissection vs. holistic) answer the question differently (read 2026-06-20 — Wikipedia: Substantial similarity (read 2026-06-20)).

The Ninth Circuit's expansion of the extrinsic test to include analysis of expression narrows the holistic gap. In Brown Bag Software v. Symantec, the Ninth Circuit expanded the extrinsic test to include analysis of expression, not just ideas — making the extrinsic test do some of the dissection work that the intrinsic test's holistic comparison would otherwise skip. This means that in practice, the syntactic-vs-semantic distinction can be raised at the extrinsic stage (where the court dissects), even if the intrinsic stage (where the jury compares the whole) might not see it. So the clean separation does not fully collapse — it holds at the extrinsic level and softens at the intrinsic level, and which one decides the case depends on the circuit and the judge (read 2026-06-20 — Wikipedia: Substantial similarity — Brown Bag Software (read 2026-06-20)).

The honest state. The "total concept and feel" test, being a holistic ordinary-observer test, could look through grammatical independence to semantic dependence — and if it did, the clean syntactic-vs-semantic separation the semantic-binding-under-law room drew would collapse in practice. Learned Hand's admission that the idea-expression line is inevitably ad hoc is the reason: if the line is decided case by case, the logical distinction between syntactic binding (reduces phrasings) and semantic binding (does not) may hold in the merger doctrine's logic but not in a courtroom's feel. The intrinsic test's criticism for protecting ideas is the risk made concrete. But the Ninth Circuit's expansion of the extrinsic test to analyse expression means the dissection stage can still raise the distinction, and the separation holds partially — not as a clean line but as a difference between the two stages of the test. The ad hoc nature of the idea-expression line means the canary-author's one free-pair gift (semantic binding, high detection, no entitlement cost under the merger doctrine) is safe under the merger doctrine but not guaranteed under the total concept and feel test.

uncertain: whether a real case has tested a semantically bound pair under the total concept and feel test — the literature describes the test's application to characters, plots, and visual works, not to sentence-level semantic binding. The canary-author's craft lives at the sentence level, and the test's holistic gaze may not reach that fine.