pre-test probability

A doctor from Medlife Crisis explains in under three minutes why even a rich patient should not simply order every medical test, touching on pre-test probability and Bayesian reasoning. False positives make blanket testing counterproductive.

Footage of CNN reporter Omar Jimenez and his crew being arrested live on air while covering the Minneapolis protests after the killing of George Floyd. He identified himself as press and offered to move.

Deviant Ollam, head of a physical penetration testing team, presents tactics for getting into buildings, from bypassing door levers with a wire to defeating bank doors. He argues that physical security is often surprisingly weak.

A 2015 talk by David Deutsch with slides and audio about constructor theory and how physics, in particular the many-worlds interpretation, can be framed without probability.

A short Whitest Kids U' Know sketch, with Spanish subtitles, in which a man repeatedly announces he wants to kill the president. It satirizes how speech and threats are policed.

Raymond Hettinger's PyBay 2018 keynote on preventing, finding and fixing bugs under a time budget. He covers testing practice, type annotation tradeoffs and the limits of coverage metrics.

Stanford professor Robert Sapolsky lectures on depression as a real biological disease. He covers its biological and psychological causes, how it differs from ordinary sadness, and ideas such as learned helplessness. He ties these together into one account.

David Beazley's PyCon India closing keynote, in which he live-codes a stack machine and grows it into an interpreter that runs WebAssembly, then uses it to play a Rust-written game. It requires no prior WebAssembly knowledge.

Sandi Metz's RailsConf 2013 talk offers practical guidelines for deciding what to test and how, so tests stay cheap and stable. She argues for testing the public interface rather than implementation and using mocks appropriately.

Shriram Krishnamurthi's PWLConf 2019 talk on the formal notion of expressive power of programming languages, based on Felleisen's paper. It explains how to tell when a feature adds power by whether emulating it requires global rewriting.

Will Wilson explains autonomous testing: using deterministic simulation and fuzzing, building on FoundationDB's approach, to test software continuously. It sets out the ideas behind his later company Antithesis.

3Blue1Brown explains why positive results on accurate medical tests are often false positives, and reframes Bayes' rule using likelihood ratios (Bayes factors) to update odds. It uses visual examples to make the reasoning intuitive.

John Hughes, co-creator of QuickCheck, talks about property-based testing of hard systems. He shows production examples where it found very low-level bugs, including issues in the CAN bus standard.

J. B. Rainsberger argues that large integrated tests are a scam: they are slow, fail opaquely, and give a false sense of coverage. He advocates focused collaboration and contract tests at boundaries instead.

Clinical psychologist Stephen Ilardi argues depression is a disease of modern civilization and presents a lifestyle-based program to treat it without drugs. Topics include exercise, sunlight, omega-3s and social connection.

Lecture 1 of Harvard's Statistics 110 with Joe Blitzstein, introducing sample spaces, the naive definition of probability, counting, binomial coefficients and the sampling table.

Hillel Wayne's PyCon 2018 talk on testing beyond pytest and mypy. It introduces property-based testing with the Hypothesis library and design-by-contract with dpcontracts, and shows how to combine them with an existing test suite.

Clinical psychologist Dr Michael Yapko draws on forty years of practice and research to explain skills that help people recover from, and even prevent, depression. He emphasizes cognitive and social factors beyond medication.

James Hoffmann demonstrates his technique for a clean, sludge-free cup from a French press: stir, break the crust, wait, and carefully pour. It is a four-minute guide.

Deviant Ollam gives a long talk on risk and preparedness: get a lawyer, passport, locksmith and other resources before you need them. It covers practical steps to build defenses against serious problems in life.

A short video of a Boeing 777 wing being tested to destruction, finally breaking at 154 percent of its designed limit load. The wing is flexed upward until it fails.

MedCram's Dr. Roger Seheult summarizes a discussion with Dr. Michael Mina on cheap, paper-based at-home COVID-19 antigen tests. It explains why lower sensitivity can still work well for screening infectious people.

Matt Risinger demonstrates a blower door test on a house, using a fan to measure air leakage and find where air gets in and out. It shows how the test reveals the quality of the build.

Alen Ladavac of Croteam talks about continuous integration and automated testing pipelines in games, with case studies from The Talos Principle and Serious Sam.

John Oliver's Last Week Tonight segment examines prediction markets such as Polymarket: the legal and moral questions, weak regulation, and insider trading and manipulation concerns.

A short news clip of a test in which a Tesla hits a child-sized dummy while a car equipped with Luminar's lidar stops in time.

Drone footage over Tesla's Fremont factory in January 2021 that captures a Gigapress die-casting machine in operation.

Matt Mullenweg joins ThePrimeagen's Twitch stream to discuss the WordPress and WP Engine dispute, including trademark use and contributions.

A CBC News report on video from a Buffalo protest in 2020 showing riot police pushing a 75-year-old man to the ground, leading to two officers being suspended. It includes graphic content.

SpaceX's livestream of the Starship SN8 high-altitude test on December 9, 2020. It ascended, did the landing flip with flap control and reached the landing point, but touched down hard because of low header tank pressure.

CNN footage of correspondent Omar Jimenez and his crew being arrested live on air by police while covering protests in Minneapolis in 2020, after identifying themselves as press.

Footage of a protest at the University of Toronto against a talk by Warren Farrell on men's issues, including protesters blocking attendees from entering. It is part of a series of videos on similar campus protests.

A US Air Force film on the Heavy Press Program, which built some of the world's largest metal forging and extrusion presses for aircraft, starting from German presses taken after WWII.

Footage of a crash test of a Boeing 727 deliberately crashed in the Mexican desert, shown from multiple angles inside and outside. It is taken from a Channel 4 documentary.

James Hoffmann demonstrates his AeroPress technique with a short recipe: 11g of coffee, 200g of just-boiled water, a 2-minute immersion, then a press. He explains why he skips rinsing, preheating and inverting.

Veritasium takes an IQ test and examines what IQ measures, its history including military use and eugenics, its controversies, and how it correlates with life outcomes. Experts including Cecil Reynolds and Stuart Ritchie contribute.

A CNBC clip of President Trump's August 2017 press briefing at Trump Tower in which he answers questions about the Charlottesville rally and says there were 'very fine people on both sides'. It is the unedited footage of the remarks.

Tim Minchin performs Prejudice, a comedic song about the power of words and the language used to abuse and demean.

Matt Parker's stand-up routine about spreadsheets, taken from the Festival of the Spoken Nerd DVD Full Frontal Nerdity. It features Excel used in unexpected ways, including turning an image into a spreadsheet.

Rare footage of Steve Jobs giving a 22 minute presentation about Apple in 1980, donated to the Computer History Museum. In it he explains the company name and the bicycle-for-the-mind idea for computers.