Oncofusion

start / graph / ana-indexing-abstracts-reaches-144-papers-that-title-search-cannot-see

Analysisstrong confidence 4 of 5: Replicated in peer-reviewed work by more than one group.

Indexing abstracts for all 4,000 cited papers, the U2 that has bound the citation index since it was built - 98.9% retrieved, and across seven probe topics abstract search reaches 144 papers title search cannot see, including 54 single-cell papers and 25 CRISPR screens

also called abstracts are indexed · 144 papers titles cannot see · U2 is narrowed, not closed · single-cell goes 19 to 73

The project keeps a searchable list of every paper it cites, used to check whether something has already been done before sending a researcher to do it. Until now that search only looked at paper titles, so a study that did the work without saying so in its title was invisible — which is exactly how the project once sent someone to run a screen that had been published three years earlier. Now it searches the summaries too, and finds 144 papers the old search could not.

The same thing, for a scientist

**Statement.** The citation index has carried the same binding limit since cycle 118, written as `U2` when it was built: > *"A TITLE IS NOT A METHOD. Searching titles for 'surfaceome' finds papers that say so; a paper that ran a surfaceome screen without the word in its title is invisible."* **That is not hypothetical.** Cycle 117 dispatched a beat asserting the surfaceome screen had never been run; **PMID 33910331 ran it in 2022 and nine node files cited it.** *"Index abstracts, not just titles"* has been an open question in **four consecutive cycles**. | | | |---|---:| | PMIDs in the index | 4,000 | | abstracts retrieved | **3,956 (98.9%)** | | no abstract — **UNSEARCHABLE**, not negative (`U3`) | 44 | **`B1` fires. Across seven probe topics, abstract search reaches 144 papers title search cannot:** | topic | by title | by abstract | **new** | |---|---:|---:|---:| | single-cell | 19 | **73** | **+54** | | condensate / phase separation | 41 | 68 | +27 | | CRISPR screen | 4 | **29** | **+25** | | degron / targeted degradation | 12 | 32 | +20 | | lineage switch | 22 | 37 | +15 | | spike-in / ChIP-Rx | 4 | 6 | +2 | | surfaceome | 1 | 2 | +1 | 🔴 **The single-cell row is the one that stings.** Cycle 120 retracted a false gap by showing the corpus held **19** single-cell papers rather than the 8 a broken index reported. **It holds 73.** That correction was itself a lower bound by nearly fourfold, and the number was quoted into a king log, a ledger section and two entries. 🟠 **`U2` is narrowed, not closed**, and the new `U2` is the mirror of the old one: **title search was precise and insensitive; abstract search is the reverse.** A raised hit count is not better coverage on its own — the hits must be read.

Go deeper
What 44 missing abstracts mean, and why they are reported rather than dropped

44 of 4,000 cited papers have no retrievable abstract — mostly older records, comments and editorials. U3 was pre-registered for them: absence of an abstract is not absence of the method, and they are recorded as null in the index so a future search reports them as UNSEARCHABLE rather than silently scoring them as not mentioning the term.

This matters more than 44/4,000 suggests, because the papers without abstracts skew old, and the oldest papers are where a method was first described under a name nobody uses now. The instrument is weakest exactly where the vocabulary problem is worst.

The pre-dispatch rule, now in its final form

Before a brief claims a method, screen or experiment has never been done here, search:

  1. the paper index — over titles AND abstracts (this entry), and
  2. the deposit index — 504 accessions, 102 GEO series (cycle 122), and
  3. check that what comes back is not a quoted mistake rather than a citation.

Four of the last six briefs contained a false premise an agent caught, and one of those premises was a published finding of mine. The rule is not that the index is now good enough to assert a gap — it is that a brief which states what is known and asks for an extension cannot fail this way at all, which has been proposed in three cycles and still not adopted.

Facts and figures
questiondoes indexing abstracts reach papers that title search cannot?
verdictB1 - worth indexing; 144 papers reachable by abstract and not by title
pmids4000
with abstract3956
without abstract44
coverage PCT98.9
total new over titles144
the row that stingscycle 120 retracted a false single-cell gap by showing the corpus held 19 such papers rather than 8; it holds 73, so that correction was itself a fourfold undercount and the 19 was quoted into a king log, a ledger section and two entries
U2 statusnarrowed, not closed - a supplementary-only method stays invisible, and the new limit is the mirror of the old: abstract search is sensitive and imprecise
absence classmeasured-not-curated
bite backThis makes 'has this been done?' cheaper to answer and therefore cheaper to assert. Every previous version of this index had the same property and each was used at least once to justify a novelty claim that was false.
topic gain
surfaceome1.000surfaceome: 1crispr_screen4.000crispr_screen: 4spike_in4.000spike_in: 4degron12.0degron: 12single_cell19.0single_cell: 19lineage_switch22.0lineage_switch: 22condensate41.0condensate: 41
topic gain — the numbers behind the chart
{
  "single_cell": {
    "title": 19,
    "abstract": 73,
    "new": 54
  },
  "condensate": {
    "title": 41,
    "abstract": 68,
    "new": 27
  },
  "crispr_screen": {
    "title": 4,
    "abstract": 29,
    "new": 25
  },
  "degron": {
    "title": 12,
    "abstract": 32,
    "new": 20
  },
  "lineage_switch": {
    "title": 22,
    "abstract": 37,
    "new": 15
  },
  "spike_in": {
    "title": 4,
    "abstract": 6,
    "new": 2
  },
  "surfaceome": {
    "title": 1,
    "abstract": 2,
    "new": 1
  }
}
Still open
  1. Re-run every topic count in the corpus over abstracts. The cycle-120 correction reported single-cell at 19 and the true figure is 73; every other topic count in that entry was computed the same way and is a lower bound by an unmeasured factor.
  2. Read the 54 new single-cell hits. The count measures the instrument's reach, not the corpus's knowledge, and nobody has looked at what those papers actually did.
  3. Index supplementary methods, or accept U2 permanently. That is where a technique is most often described without appearing in title or abstract, and it is the remaining gap.
  4. Record which papers have no abstract at the point of search, so their silence reads as UNSEARCHABLE. The index stores null correctly but no search path yet surfaces that distinction to a reader.
Every source behind this entry (1)
  1. E1strong confidence 4 of 5: Replicated in peer-reviewed work by more than one group.analysis

    Fetching PubMed abstracts by efetch for all 4,000 PMIDs in the corpus citation index retrieves an abstract for 3,956 of them, 98.9 percent, with 44 recorded as null rather than as empty. Comparing title-only against title-or-abstract matching across seven pre-declared probe topics: single-cell rises from 19 to 73 papers, condensate or phase separation from 41 to 68, CRISPR screen from 4 to 29, degron or targeted degradation from 12 to 32, lineage switch from 22 to 37, spike-in from 4 to 6 and surfaceome from 1 to 2, giving 144 papers reachable by abstract that are not reachable by title.

    What this evidence cannot show

    AN ABSTRACT IS STILL NOT A METHOD. A technique used but described only in supplementary methods, or named differently, remains invisible; this narrows U2 and does not close it, and no brief should treat a miss here as proof of absence. MORE TEXT MEANS MORE FALSE POSITIVES: title search was precise and insensitive and abstract search is the reverse, so the raised counts include papers that merely mention a topic in passing and every hit must be read. THE SEVEN PROBE TOPICS AND THEIR SEARCH TERMS ARE MINE, chosen after the corpus was familiar to me, so the 144 measures the gain on topics I thought to test rather than the gain in general. The abstract parser splits an efetch text dump heuristically and drops blocks shorter than 80 characters, so very short abstracts are counted as absent. 44 papers have no abstract, they skew old, and old papers are exactly where a method is most likely to be described under a name nobody uses now.

    Evidence that argues against this (2)
    • The 144 is a count of papers a keyword now reaches, not of papers that ran the method. Abstract search for 'single-cell' will match any paper that mentions single-cell data in its motivation, and none of the 54 new single-cell hits has been read. The honest claim is that the instrument's reach improved, not that the corpus knows 54 more single-cell studies.
    • Improving the index is the same response this project has made to every false gap claim, and the index has now been rebuilt or extended in four consecutive cycles while the habit that causes the failures - asserting novelty in a dispatch brief - has been flagged three times and never changed. A better search tool lowers the cost of a bad habit rather than removing it.
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