Daragh Ó Briain
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daraghobrien.bsky.social
Daragh Ó Briain
@daraghobrien.bsky.social
1.3K followers 150 following 920 posts
Flumping along in the world of data since Long Ago. Posts as @castlebridge_chief here and on https://mastodon.ie. CEO @ Castlebridge.ie.
Doctoral candidate at UL looking at #DataGovernance. Author of several books on data stuff.
Not the comedian
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daraghobrien.bsky.social
Who is solving the Louvre robbery? Right answers only.

If @tupped.bsky.social is up for it.. one of Dublin’s unsung literary heroes.
Screenshot of a green book cover. The book is “McGarr and the Method of Descartes” by Bartholomew Gill.
October 21, 2025 at 6:48 AM
daraghobrien.bsky.social
Oh look. Here’s another example of someone who appears to have two different views on things (24hrs apart) because their work requires it.
Screenshot of Fionnan Sheehan’s article in Irish Independent 21st October 2025 headline: “Don’t mention the banks –the left is unified in ignoring Catherine Connolly’s repossession cases” Screenshot of Fionnán Sheehan article in Irish Independent 20th October 2025. Headline: “Catherine Connolly was right to represent banks in home repossessions”
October 21, 2025 at 6:30 AM
daraghobrien.bsky.social
Looking at #Amazon to get a copy of the #DataEthics book I co-authored with Katherine O’Keefe.

Almost €20 in the difference. For the same book.
Photo of Amazon.ie listing for “Data Ethics” by O’Keefe and O Brien. Price is €66.03. Photo of Amazon.co.uk listing for “Data Ethics”. Price is €46.10
October 8, 2025 at 2:04 PM
daraghobrien.bsky.social
Coddle for the win on a wet and windy day when I have a whack of lurgy.
Photo of home made coddle in a white bowl. Coddle is bacon chunks, sausages, carrots and onions slow cooked in a vegetable stock. Broth is yellow, possibly due to the heretical addition of Dijon mustard to the mix during the slow cooking.
September 14, 2025 at 11:44 AM
daraghobrien.bsky.social
So, whenever I see people saying ChatGPT said a thing, I always wonder what the prompt was.
Goose chasing man meme. Top caption: “what was the prompt you used to get that result in ChatGPT” Bottom caption: “show us the prompt mother fucker!!”
September 9, 2025 at 9:12 PM
daraghobrien.bsky.social
I am skeptical. Apparently I transcend arbitrary (US defined) class boundaries.
A radial chart showing pseudoscience findings about social class based on food preferences.
June 29, 2025 at 11:37 PM
daraghobrien.bsky.social
Haven’t we all at some stage.
Screenshot of Withnail and I standing in rain looking miserable. The caption is “we appear to have accidentally gone to Cavan”
April 30, 2025 at 6:33 AM
daraghobrien.bsky.social
#Starbug
Screen shot of a green space ship that has 3 round sections. It is Starbug from Red Dwarf
March 24, 2025 at 1:42 AM
daraghobrien.bsky.social
Is it wrong that I am saving screenshots of AllWrong Mosk’s discussions of US Government data to use as illustrations of why fundamentals of data management are now core skills for executives in all industries?
Screenshot of Twitter exchange where AllWrong Mosk abuses a commenter for thinking the US govt uses SQL, the basic query language for relational databases. AllWrong’s original post declares massive duplication of Social Security Numbers. Which might be perfectly valid in several circumstances in a relational database if SSN is a foreign key.
February 12, 2025 at 9:51 AM
daraghobrien.bsky.social
But when they seem to lack even basic knowledge of relational database theory that technical conversation starts wrong and gets worse fast.
Screen shot of Bluesky post commenting on Mike Lee and Elon posts on X claiming that there are duplicate social security entries which they claim is a clear indicator of fraud but is more likely foreign key relationships in database tables or transactional data using SSN as a surrogate key. But certainly not evidence of fraud.
February 9, 2025 at 10:59 PM
daraghobrien.bsky.social
So, DPC complaint under SI336/2011 filed. I think an argument can be made that s9 of SI336/2011 applies to location data of connected EV’s as they are mobile phones on wheels. (Right down to the SIM card and the need to plug them in to recharge).

VW statements have said that data pseudonymised.
A screenshot of section 9 of SI336/2011, the Irish law transposing ePrivacy Directives. The screenshot reads: Location data other than traffic data 9. (1) No person shall process location data other than traffic data relating to users or subscribers of undertakings unless— (a) such data are made anonymous, or (b) they have obtained the consent of the users or subscribers in accordance with section 2A(1)(a) of the Act of 1988 (inserted by section 4 of the Act of 2003) to the extent and for the duration necessary for the provision of a value added service. (2) An undertaking, that has not already done so, shall inform its users or subscribers, prior to obtaining their consent in accordance with section 2A(1)(a) of the Act of 1988 (inserted by section 4 of the Act of 2003), of— (a) the type of location data other than traffic data which will be processed, (b) the purposes and duration of the processing, and (c) whether the data will be transmitted to a third party for the purpose of providing the value added service. (3) An undertaking shall give users or subscribers the possibility to withdraw their consent for the processing of location data other than traffic data at any time by
December 28, 2024 at 5:19 PM
daraghobrien.bsky.social
I shit you not.
Screenshot from X of bonkers conspiracy theory that Gerry Hutch is an agent of “The Regime”
November 30, 2024 at 6:08 PM
daraghobrien.bsky.social
Show me a picture on your phone that has your energy but isn’t a selfie
A scene from the movie “The Sound of Music”. 4 Children sit on a green hillside wearing white dresses. A woman wearing a red dress and white shirt is holding a guitar. A speech bubble contains the lyrics of the refrain from Mötorhead song “The Ace of Spades”
November 27, 2024 at 10:39 PM
daraghobrien.bsky.social
Meh.
A ginger kitten standing on a wooden floor. The kitten is looking at the camera
November 25, 2024 at 6:20 PM
daraghobrien.bsky.social
Happy #Caturday.
A grey kitten and a ginger kitten lying side by side outstretched on a red cushion. The kittens are asleep.
November 23, 2024 at 8:43 AM
daraghobrien.bsky.social
You know you’ve made it when you are in one of @gavinsblog.bsky.social’s starter packs…

Jeez. Better start posting something better than cat pictures
A grey kitten and a ginger kitten sitting on a windowsill looking out through a window that has privacy screen on it to stop people looking in.
November 22, 2024 at 12:27 AM
daraghobrien.bsky.social
#Caturday New arrivals at my house have settled in.
A ginger tabby kitten and a grey calico kitten sitting side by side on a black cushion which is on a red sofa.
November 16, 2024 at 9:43 AM
daraghobrien.bsky.social
A cartoon meme of a Trojan horse being pulled through gates. There is a text caption above the people pulling the horse. It reads “business users”. The horse is labelled “gen ai hype”. Inside the horse is text labels reading “data governance, data quality, metadata management”
November 5, 2024 at 10:39 PM