The Two Generals’ Problem

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Time to tell a story about idempotency, computer science, and the Night of the Multiple Orders. • Sponsored by Dashlane —try 30 days for free at: dashlane.com/tomscott

MORE BASICS: youtube.com/playlist?list=PL96C35uN7xGLLeET0dOWaKHkAlPsrkcha

Written by Sean M Elliott and Tom Scott
Directed by Tomek
Graphics by Mooviemakers mooviemakers.co.uk/
Audio mix by Haerther Productions haerther.net/

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jammin023
Jammin023
21 August 2019

I wish these videos had been around back when I was doing Soft Eng at uni... your explanations are so much clearer than my lecturers could manage!

Orion Red
Orion Red
21 August 2019

This is exactly how I ended up with two gallons of milk in my fridge and two loaves of bread in my cupboard last week. It's also how I ended up with a gallon of spoiled milk and a loaf of stale bread this week.

ruwiki
Ruwiki
20 August 2019

"it's unsolveable" me at 2 am: well, there must be a way ...

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Payoneer
21 August 2019

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Oz El Coskuner
Oz El Coskuner
20 August 2019

Just giving thumbs down for showing 2 long (unskippable) ads. I hope creators puts some pressure on YouTube. Because YouTube literally don't give a damn about feelings of customers who are not paying. WHY WE STARTED WATCHING YOUTUBE? The biggest argument was "so that you don't have to watch long commercials of TV and get brainwashed". Now average ad on YouTube is surpassing TV. Anyway, since I got Amazon prime, I reduced YouTube time to 2 hours a week. Much happier. And I will never pay for YouTube, just because their approach. You cannot shove your will down to people's throat and expect success. When I see YouTube logo, I see a RABID DOG with dollar symbols on his red eyes. Disgusting.

John Dean
John Dean
20 August 2019

There IS answer to the Two Generals' Problem: go to your local chippie.

Honeyminer
Honeyminer
21 August 2019

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Airpolygon
Airpolygon
20 August 2019

Very interesting!

Rens Breur
Rens Breur
20 August 2019

But this anecdote isn't REALLY an example of the two generals problem right? The only 'attacker' is the server processing the order request. The two generals problem can't be solved by using a unique key.

Anne Frank
Anne Frank
20 August 2019

We all live with the objective of being happy; our lives are all different and yet the same.

Joseph Thomas
Joseph Thomas
20 August 2019

Can you find a different shirt?

iammaxhailme
Iammaxhailme
20 August 2019

"Next time, I'll just cook for myself" Or, you can just call the restaurant and place your order verbally. Magic! I don't know how it is in the UK, but in NYC you sometimes get it a bit cheaper this way becuase apps take a cut

Chuck Norris
Chuck Norris
21 August 2019

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The (listen) is a grammatical article in English, denoting persons or things already mentioned, under discussion, implied or otherwise presumed familiar to listeners or readers. It is the only definite article in English. The is the most commonly used word in the English language, accounting for seven percent of all words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with pronouns of either genders. The word can be used with... tom scott, tomscott, the basics, computer science, two generals problem, two generals' problem, the two generals problem, idempotency, idempotency key, idempotency token, idempotence,

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Video Data

  • Duration8:26
  • Date12 August 2019
  • ChannelTom Scott
  • Video QualityHD

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