{"id":7418,"date":"2026-06-05T10:13:31","date_gmt":"2026-06-05T14:13:31","guid":{"rendered":"https:\/\/beomniscient.com\/?p=7418"},"modified":"2026-06-05T10:13:32","modified_gmt":"2026-06-05T14:13:32","slug":"probability-engineering","status":"publish","type":"post","link":"https:\/\/beomniscient.com\/blog\/probability-engineering\/","title":{"rendered":"Probability Engineering"},"content":{"rendered":"\n<p>In probability theory, the&nbsp;<a href=\"https:\/\/en.wikipedia.org\/wiki\/Urn_problem\" target=\"_blank\" rel=\"noreferrer noopener\">urn model<\/a>&nbsp;is one of the oldest and most generative thought experiments.<\/p>\n\n\n\n<p>You have a bag containing marbles of different colors. You draw one, note the color, return it. Do this enough times and the draws converge toward the true distribution of marbles inside, a distribution you can\u2019t see directly but can infer from sufficient sampling.<\/p>\n\n\n\n<p>The&nbsp;<a href=\"https:\/\/en.wikipedia.org\/wiki\/P%C3%B3lya_urn_model\" target=\"_blank\" rel=\"noreferrer noopener\">Polya urn<\/a>&nbsp;adds a twist.<\/p>\n\n\n\n<p>After each draw, you return the marble plus one additional marble of the same color. Early draws compound. A color that appears early in the sequence becomes disproportionately likely to appear later. The distribution is path-dependent and self-reinforcing. Small initial advantages become structural ones.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"918\" data-src=\"https:\/\/beomniscient.com\/wp-content\/uploads\/image-253-1024x918.png\" alt=\"\" class=\"wp-image-7419 lazyload\" data-srcset=\"https:\/\/beomniscient.com\/wp-content\/uploads\/image-253-1024x918.png 1024w, https:\/\/beomniscient.com\/wp-content\/uploads\/image-253-300x269.png 300w, https:\/\/beomniscient.com\/wp-content\/uploads\/image-253-768x688.png 768w, https:\/\/beomniscient.com\/wp-content\/uploads\/image-253.png 1116w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/918;\" \/><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/mathenchant.wordpress.com\/2015\/10\/16\/polyas-urn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Image Source<\/a><\/figcaption><\/figure>\n\n\n\n<p>To me, this is a useful model to apply to marketing.<\/p>\n\n\n\n<p>Instead of trying to map out discrete and linear touchpoints along an imaginary funnel, or trying to model keyword rankings, click-through-rate curve, and conversion rate per page (a model that is quickly becoming anachronistic), you invest in actions that create cumulative advantage, a&nbsp;<a href=\"https:\/\/beomniscient.com\/blog\/the-matthew-effect\/\" target=\"_blank\" rel=\"noreferrer noopener\">Matthew effect<\/a>. You seek to increase your probability of being drawn at any given touchpoint.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-deterministic-illusion\"><strong>The Deterministic Illusion<\/strong><\/h2>\n\n\n\n<p>For twenty years, SEO operated under what was effectively a deterministic model.<\/p>\n\n\n\n<p>A keyword had a search volume. You occupied a position. That position was observable, roughly stable, and responsive to known inputs. The relationship between action and outcome was noisy but legible, close enough to deterministic that we could build dashboards, attribution models, and quarterly forecasts around it.<\/p>\n\n\n\n<p><em>(Suspend all justifiable nuances with the accuracy of search volume, stability and importance of keyword rankings, and utility of those attribution models for just a second. I\u2019m well aware of the imperfections of the previous model).<\/em><\/p>\n\n\n\n<p>This was always an approximation. A keyword is a sort of proxy for intent, and in reality, a page will show up for a cluster of semantically related queries aggregating toward a topic, and Google\u2019s ranking algorithm incorporated hundreds of signals with stochastic elements. But the approximation was useful, and you really could model it out quite simply over a reasonable time period.<\/p>\n\n\n\n<p>George Box\u2019s dictum applied: the&nbsp;<a href=\"https:\/\/beomniscient.com\/blog\/organic-traffic-growth-model\/\" target=\"_blank\" rel=\"noreferrer noopener\">model was wrong but useful.<\/a><\/p>\n\n\n\n<p>AI search forces all of those inadequacies to the surface, and marketers now need to grapple with a world in which the previous models barely hold a simulacrum of utility. It invalidates the foundational assumption that there exists a stable, observable position to optimize toward. LLMs are probabilistic at every layer: the prompt interpretation, the retrieval process, the generation of the response, and the selection of citations. The output is sampled from a distribution, not retrieved from an index. The&nbsp;<a href=\"https:\/\/ipullrank.com\/agentic-rag\" target=\"_blank\" rel=\"noreferrer noopener\">underlying process is becoming increasingly opaque<\/a>.<\/p>\n\n\n\n<p>There\u2019s a lot of evidence stacking up here.&nbsp;<a href=\"https:\/\/www.sistrix.com\/blog\/ai-citation-drift-how-stable-are-sources-in-ai-search-results\/\" target=\"_blank\" rel=\"noreferrer noopener\">SISTRIX tracked<\/a>&nbsp;82,000 prompts across three platforms over 17 weeks. Google AI Mode rotates citation sources at 56% per week. ChatGPT rotates at 74%. Over six months, 70\u201390% of cited domains turn over completely.&nbsp;<a href=\"https:\/\/www.airops.com\/report\/how-citations-mentions-impact-visibility-in-ai-search\" target=\"_blank\" rel=\"noreferrer noopener\">AirOps found that only 1 in 5 brands<\/a>&nbsp;maintain citation visibility across five consecutive runs of the same query.<\/p>\n\n\n\n<p>I\u2019ve replicated roughly the same results with several Omniscient clients and prospects.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-query-fanout-and-the-evolution-of-the-keyword\"><strong>Query Fanout and the Evolution of the Keyword<\/strong><\/h2>\n\n\n\n<p>The unit of analysis in traditional SEO was the keyword.<\/p>\n\n\n\n<p>In AI search, the&nbsp;<a href=\"https:\/\/ahrefs.com\/blog\/query-fan-out\/\" target=\"_blank\" rel=\"noreferrer noopener\">unit of analysis doesn\u2019t exist in a stable form<\/a>. When a user enters a prompt, the model generates several (the number changes by model and over time) internal sub-queries (what\u2019s called query fanout) to retrieve information before synthesizing an answer.&nbsp;<a href=\"https:\/\/surferseo.com\/blog\/query-fan-out-impact\/\" target=\"_blank\" rel=\"noreferrer noopener\">Surfer found only<\/a>&nbsp;27% of these sub-queries remain consistent across multiple runs.&nbsp;<a href=\"https:\/\/surferseo.com\/blog\/keyword-query-fan-out-research\/\" target=\"_blank\" rel=\"noreferrer noopener\">Sixty-six percent appear<\/a>&nbsp;exactly once and never again.<\/p>\n\n\n\n<p>Think about what this means.<\/p>\n\n\n\n<p>The retrieval layer underneath AI search is itself stochastic. The model doesn\u2019t just produce variable outputs from fixed inputs. It generates variable inputs to its own retrieval system. You\u2019re dealing with compounded variance: uncertainty in what the user asks, uncertainty in how the model interprets it, uncertainty in what sub-queries the model generates, uncertainty in which sources those sub-queries surface, and uncertainty in how the model synthesizes and cites the results.<\/p>\n\n\n\n<p>What all of this means is it\u2019s very difficult to measure things and it\u2019s also difficult to ground decisions in stable data.<\/p>\n\n\n\n<p>An&nbsp;<a href=\"https:\/\/arxiv.org\/abs\/2604.07585\" target=\"_blank\" rel=\"noreferrer noopener\">academic paper from April 2026 (Schulte et al.)<\/a>&nbsp;formalized the measurement problem: AI search visibility should be characterized as a distribution, not a single-point outcome.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-from-optimization-to-probability-engineering\"><strong>From Optimization to Probability Engineering<\/strong><\/h2>\n\n\n\n<p>I often use the analogy of a cocktail party to explain&nbsp;<a href=\"https:\/\/beomniscient.com\/blog\/surround-sound-seo\/\" target=\"_blank\" rel=\"noreferrer noopener\">Surround Sound SEO<\/a>&nbsp;and, now, AI search.<\/p>\n\n\n\n<p>Here\u2019s the gist of it: imagine you\u2019re at a cocktail party and you ask a group of people what book they are reading.<\/p>\n\n\n\n<p>If one person mentioned The Power Broker, you may check it out. If everyone mentions it, you\u2019ll almost certainly check it out. And if no one mentions it, well, you never had the chance to know it existed.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"640\" data-src=\"https:\/\/beomniscient.com\/wp-content\/uploads\/image-254-1024x640.png\" alt=\"\" class=\"wp-image-7420 lazyload\" data-srcset=\"https:\/\/beomniscient.com\/wp-content\/uploads\/image-254-1024x640.png 1024w, https:\/\/beomniscient.com\/wp-content\/uploads\/image-254-300x187.png 300w, https:\/\/beomniscient.com\/wp-content\/uploads\/image-254-768x480.png 768w, https:\/\/beomniscient.com\/wp-content\/uploads\/image-254.png 1116w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/640;\" \/><\/figure>\n\n\n\n<p>Now let\u2019s extend the analogy. Most AI search conversation centers around a single cocktail party with a stable group of attendees.<\/p>\n\n\n\n<p>But imagine there are endless cocktail parties happening across the world, and most of them include different attendees (with a few promiscuous party goers attending multiple).<\/p>\n\n\n\n<p>What you want to do is increase the probability that, at any given cocktail party, the majority of people will mention your book, agency, software or running shoes when someone asks about the best book, agency, software, or running shoes.<\/p>\n\n\n\n<p>To do that, it\u2019s not enough to focus on begging or paying the people at any given cocktail party to mention your thing (because they might not be at the next cocktail party). To do that, brands should focus on what we call&nbsp;<a href=\"https:\/\/beomniscient.com\/blog\/brand-gravity\/\" target=\"_blank\" rel=\"noreferrer noopener\">brand gravity<\/a>&nbsp;or&nbsp;<a href=\"https:\/\/beomniscient.com\/blog\/omnipresence\/\" target=\"_blank\" rel=\"noreferrer noopener\">omnipresence.<\/a><\/p>\n\n\n\n<p>This is not scattershot. It\u2019s still targeted at the surface areas that are influential (to humans and agents).<\/p>\n\n\n\n<p>But it\u2019s focused less on spamming an individual Reddit thread, for example, and more on building a community management and advocacy program that ensures your Reddit presence is active and positive.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Reinforcement and Cumulative Advantage<\/strong><\/h2>\n\n\n\n<p>The double edged sword with \u201cprobability engineering\u201d* and AI search is that early salience tends to lead to greater salience over time.<\/p>\n\n\n\n<p><em>(*I\u2019m calling it \u201cprobability engineering\u201d here as a slightly tongue in cheek play at the idea that everything has to be \u201cengineering\u201d nowadays \u2013 GTM engineering, relevance engineering, content engineering, marketing engineering. The top of Maslow\u2019s hierarchy of coined phrases, of course, must be Engineering Engineering.)<\/em><\/p>\n\n\n\n<p>The Polya urn model explains why.<\/p>\n\n\n\n<p>In a self-reinforcing system, early entrants into the citation network build compounding advantages.<\/p>\n\n\n\n<p>Brands that appear in frequently-cited sources get trained into models, get retrieved more often, get cited more, and become harder to displace. Content creators using Claude to produce blog posts run agentic research, which pulls from these sources, and produce more brand mentions. The distribution follows a path-dependent process. This is why the window to invest is now, before the urn\u2019s distribution solidifies.<\/p>\n\n\n\n<p><a href=\"https:\/\/sparktoro.com\/blog\/attribution-is-dying-clicks-are-dying-marketing-is-going-back-to-the-20th-century\/\" target=\"_blank\" rel=\"noreferrer noopener\">Rand Fishkin has called for a shift from attribution to influence<\/a>:\u00a0<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>\u201cBecause attribution fundamentally don\u2019t work anymore. When you make marketing investments based, instead, on knowing who your audience is and where\/how you can influence them, you can massively improve your results.\u201d<\/em><\/p>\n<\/blockquote>\n\n\n\n<p>I think this is the right approach. Of course, we\u2019ll need to rethink our incentive structures and KPIs, because it\u2019s not as simple as clicks and rankings. But&nbsp;<a href=\"https:\/\/beomniscient.com\/blog\/traffic-trap\/\" target=\"_blank\" rel=\"noreferrer noopener\">was that ever the best approximation of value<\/a>, anyway?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Probability Engineering Actually Requires<\/strong><\/h2>\n\n\n\n<p>If the job is to increase the probability of inclusion across a volatile distribution, the work is mostly upstream of what we\u2019d consider traditional SEO or even current AEO tactics.<\/p>\n\n\n\n<p>It is both offensive and defensive. It is making sure your positioning is echoed coherently across the web, not just on your site, but in every source an LLM might ingest. It is your inclusion on the right review sites, with reviews that substantiate your claims. It is community participation and social presence. It is podcast appearances and editorial coverage. It is building a dense, expansive web of proof points.<\/p>\n\n\n\n<p>Some of these are targeted for AI search. But many aren\u2019t. Most are done for the sake of building the brand. AI search visibility is, in this framing, a byproduct of genuine brand construction. The probability of inclusion rises as the brand becomes more real, more coherent, and more present across the information ecosystem that models ingest.<\/p>\n\n\n\n<p>This is also where the urn model becomes strategically instructive beyond metaphor.<\/p>\n\n\n\n<p>In a Polya urn, the specific sequence of early draws shapes the long-run distribution. In AI search, the specific sources that cite you early (during a model\u2019s training data window, or in the high-authority publications that RAG systems preferentially retrieve) have disproportionate influence on your long-run visibility. Not all marbles are equal.<\/p>\n\n\n\n<p>A citation in a source that the retrieval layer trusts is worth more than a hundred mentions in sources it doesn\u2019t. Scaling thousands of pages, in other words, doesn\u2019t solve fundamental problems of authority or relevance. The engineering is in knowing which marbles to add and where.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Robustness Over Optimization<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.amazon.com\/Antifragile-Things-That-Disorder-Incerto\/dp\/0812979680\" target=\"_blank\" rel=\"noreferrer noopener\">Nassim Taleb\u2019s distinction<\/a>&nbsp;between fragile, robust, and antifragile systems is helpful here. A fragile AI search strategy breaks when conditions change. A robust one survives. An antifragile one actually benefits from the volatility.<\/p>\n\n\n\n<p>Imagine, for a moment, that self promotional listicles (and listicle swaps for off page brand mentions) don\u2019t work forever. Imagine they are either table stakes due to&nbsp;<a href=\"https:\/\/beomniscient.com\/blog\/the-red-queen-effect\/\" target=\"_blank\" rel=\"noreferrer noopener\">Red Queen effects<\/a>&nbsp;and automation, or simply not considered as authoritative by the models.<\/p>\n\n\n\n<p>If that were to happen, would your position be fragile, robust, or antifragile?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Distribution, Not the Draw<\/strong><\/h2>\n\n\n\n<p>The funnel was a useful fiction for a more deterministic era.<\/p>\n\n\n\n<p>AI search demands a different model, one that treats visibility as a probability distribution rather than a position, measurement as sampling and signal, and strategy as shaping a distribution of influence rather than holding a rank.<\/p>\n\n\n\n<p>You can\u2019t always control which marble gets drawn, just like you can\u2019t control the conversation at every cocktail party around the world. But you can influence the composition of the urn. You can add marbles in the right places at the right time. You can build the kind of brand presence that makes favorable draws more likely across more contexts.<\/p>\n\n\n\n<p>Want more insights like this?\u00a0<a href=\"https:\/\/www.linkedin.com\/in\/iamalexbirkett\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/beomniscient.com\/newsletter\/\" target=\"_blank\" rel=\"noreferrer noopener\">Subscribe to Field Notes<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In probability theory, the&nbsp;urn model&nbsp;is one of the oldest and&#8230;<\/p>\n","protected":false},"author":3,"featured_media":7422,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[184,25],"tags":[],"wf_post_folders":[],"class_list":{"0":"post-7418","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-field-notes","8":"category-seo"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Probability Engineering - Omniscient Digital<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/beomniscient.com\/blog\/probability-engineering\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Probability Engineering\" \/>\n<meta property=\"og:description\" content=\"In probability theory, the&nbsp;urn model&nbsp;is one of the oldest and most generative thought experiments. 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