I was scrolling on my phone on a flight last week when I came across a story that would’ve been unlikely 10 years ago. An American AI engineer who’d just paid €7.80 for a pint of Guinness in Dublin, gotten annoyed, and decided to do something slightly unhinged about it.
Over St. Patrick’s Day weekend, Matt Cortland deployed an AI voice agent named Rachel — Northern Irish accent, modeled on a contestant from The Traitors UK — to call more than 3,000 pubs across all 32 counties of Ireland and ask one simple question. “How much is a pint of Guinness?”
More than 1,000 bartenders answered. Cortland fed the transcripts into Claude, structured the data, and published it at guinndex.ai. The total cost was about €200. The national average price as €5.95. The Auld Dubliner in Temple Bar was €10. At least one pub has already lowered its prices.
Some of the bartenders treated Rachel like a regular — chatted her up, offered recommendations, and even threw in some banter. They were being warm and friendly to a piece of voice software that was, at that exact moment, building a national searchable database of their pricing for the entire country to judge.
The Verification Era
In my upcoming book The Signal Gap: How to Boost Believability and Influence in the Age of DoubtI write about “The Verification Era.” This is the cultural shift away from “trust, then verify” toward “verify, then trust.” Until recently, that verification still required a human.
Someone had to read your LinkedIn, pull up Glassdoor, ask around, and do the work. It was slow, cumbersome, and often skippable.
The Guinndex shows how quickly that era is ending.
