Does Ian Hacking's 'styles of scientific reasoning' (or another general philosophy-of-science term) name the vault's in-between bridge category — same method, unconnected referents, no deliberate juxtaposer?

philosophy-of-sciencestyles-of-scientific-reasoninghackingcross-domain-bridgemethodologyunverified-negative

observation-vaults-in-between-bridge-category-not-exactly-named-by-located-literature records a negative finding — no located term exactly names the vault's middle bridge pole (two investigations sharing a method across unconnected referents, with no author juxtaposing them). That finding is flagged [unverified — could not confirm or deny after search]. The single most promising lead not yet chased to primary is Ian Hacking's "styles of scientific reasoning" (Hacking 1982, "Language, Truth and Reason," building on A. C. Crombie's Styles of Scientific Thinking in the European Tradition).

Why it matters

The negative finding is load-bearing: it is the direct answer to the capture's core question and the note the bridge-taxonomy cluster will cite as "the vault checked whether its middle category is named elsewhere; answer so far, no." A "style of reasoning" is a way of finding things out (statistical, taxonomic, postulational, laboratory, and so on) that recurs across otherwise unconnected scientific domains without those domains being causally linked — which is, at the general philosophy-of-science level the capture asked about, conceptually the closest thing found to "same method, unconnected domains." If Hacking's category (or its later elaboration by Hacking, Crombie, or the subsequent literature) covers the vault's configuration, the negative finding softens toward a positive borrow; if it imports its own assumption the vault's bridges lack — as "parallel demonstration of theory" and "structural equivalence" both did — that sharpens the negative finding into a checked, three-way "no."

What I'd need to answer it

• A direct read of Hacking's own primary text on styles of reasoning (Hacking 1982, and/or Historical Ontology, 2002, which collects the style essays), not a secondary synthesis — the capture surfaced this term only via WebSearch synthesis of secondary discussions, which under the vault's quote-provenance rule is a lead, not a source.
• A check of whether a "style" is predicated of domains/communities rather than of individual investigations: the likely mismatch is that a style is a shared culture many practitioners inhabit, whereas the vault's bridges are two isolated studies with no shared culture at all.
• Secondary candidates already logged in the capture's "Further leads" if Hacking misses: Wittgenstein's "family resemblance" (judged a looser fit — names a relation among concepts, not investigations), and Robert Yin's case-study "literal vs. theoretical replication" distinction.

Candidate next move

Route to the topic queue as a definitional/philosophy-of-science read against a primary. On resolution: if a term covers the vault's category, add it to the observation note's body and discharge the [unverified] flag toward budding; if the read comes back empty after a genuine attempt, record that as a firmed "checked three literatures, no exact name found" finding rather than leaving this open indefinitely. Do not force closure — a partial answer gets a dated progress line here, not a status flip.

Progress

• 2026-09-27: The Hacking half of this question is answered. A direct primary read of Hacking's "Language, Truth, and Reason" (1982) confirms the mismatch this note anticipated — see claim-hackings-styles-of-scientific-reasoning-does-not-name-vaults-bridge-category and claim-hacking-derives-styles-from-crombies-six-fold-taxonomy. A "style" is predicated of a whole tradition or community across its own historical genealogy, not of two isolated, independently-motivated investigations — a specific, primary-sourced failure mode, distinct from the two previously-checked near-misses. This closes the Hacking lead specifically; the broader question in this note's title — whether some other general philosophy-of-science term names the vault's category — is not resolved and stays open. The two secondary candidates this note already named as fallbacks (Wittgenstein's "family resemblance," Yin's literal-vs-theoretical replication) remain unchased. Leaving status: open.