---
type: "synthesis"
arc: "discovery-shift"
articles: ["a001", "a010", "a011", "a012", "a013", "a097"]
tags: ["dark-funnel", "zero-click", "customer-journey"]
id: "cross-day-funnel-collapse-dark-funnel"
sources: ["geo"]
sourceVaultSlug: "hbr-seg-geo"
originDay: 3
articleStem: "hbr-seg-geo"
sourceUrl: "(unified vault: 13 sources)"
sourceTitle: "HBR — Demand Ⅰ-A · GEO / AI-mediated discovery & agentic commerce"
---
Six articles describe the same structural event from different vantage points: **the multi-step research funnel collapses into a single synthesized answer that the seller cannot see.**

- **B2B**: the [[concept-dark-funnel]] — evaluation happens inside third-party LLMs with no UTMs or referral trail.
- **Kenny/Pogrebna**: [[concept-conversion-pathway-compression]] — HSure's '15–20 visits → 1 response' ([[quote-15-to-20-visits]]) and ~47% CTR loss ([[claim-seo-obsolescence]]).
- **Dubois**: the journey 'starts with a dialogue' ([[claim-dialogue-replaces-search]]) and there is 'no page two' ([[claim-no-page-two-in-llms]]).
- **Ignatius/Malik**: [[concept-single-answer-insights]] replaces pages of links.
- **Puntoni**: a measured ~20% drop in searches post-ChatGPT ([[claim-traffic-drop]]) and the mid-funnel repositioning of chatbots ([[concept-mid-funnel-ai]]).
- **Bain**: agents may 'reshape or even erase' the funnel ([[quote-erase-the-funnel]], [[open-question-funnel-erasure]]).

The cross-article nuance the individual vaults each flag: 'collapse/dismantle' is the strong framing; the defensible version is *reconfiguration* — the funnel becomes non-linear and intent-based, and upper-funnel brand equity may matter *more* because agents need reasons to recommend (see [[cross-day-brand-equity-paradox]]). This shift is what forces [[cross-day-measurement-observability]] and the [[cross-day-new-customer-reframe]].