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A plant-based diet is cheaper than a regular diet: https://www.ox.ac.uk/news/2021-11-11-sustainable-eating-chea...


Looking at Tesco online in UK: there's a soy protein 'mince' a £3.72/kg. Beef or chicken mince at £5. Quorn mycoprotein at £8.33. Beyond Meat at £13.

Out of the 5 vegan and 8 vegetarian options, only the soy protein is cheaper than meat.

I might replace one meal a week with the soy protein, but I'd be concerned about long term effects of phytoestrogen, especially on growing children? Mind you many foods have some hidden soy 'bulk' nowadays.

https://www.hsph.harvard.edu/nutritionsource/soy/ relates to understanding of health benefits/detriments of soy.


Why do you need a "minced meat" substitute anyway? Compare your minced meat to a can of beans which one is cheaper.

Moreover, it is well established research that most modern western diets contain too much animal products. If you think that living vegetarian causes so much problems, you need to explain how many cultures who live almost exclusively vegetarian (e.g. In some areas of India) without significant health problems.


The imitation meat stuff is always expensive. Going straight to that for protein betrays a lack of imagination or culinary knowledge.

How about beans, lentils, and frozen peas?


You wouldn’t use “meat replacements” though you’d just eat a vegetarian diet. If hundreds of millions of Indians can do it, so can westerners.


Change is hard for [some] people. Fail to acknowledge that and you'll fail to foment radical change.

That said, I merely posted this data because I looked it up and found it interesting as a comparison.


You're going to have to provide some sources if you'll be making such bold claims ...


https://www.ewg.org/foodscores/ might help you target specific brands. Many soy milks count as ultra processed because the additives are (calcium, vitamin b etc.). Less healthy than the unadulterated brands? I think the research is still out on that.

(and cow milk often has similar additives, so this isn't supporting the original claim)


I'll bite. I'm currently carrying a bottle of whole milk home from the shop to have a glass.

It has 15g of protein per 500ml, a ton of calcium and 350ish calories.

Super nutritious.


Looking at the carton of soymilk from my fridge.

It has 18g of protein per 480ml, 60mg of calcium, and 200 calories. (Also 2.4mg of iron and 860mg of potassium)

The only ingredients are water and soybeans.


500ml of soy milk has almost twice as many protein and tons of nutrients too. It requires like 5% as much water to produce, 0 antibiotic, and no animals


And when factoring in the negative externalities extremely expensive. When factoring in the moral aspect considering the way the cows are treated it’s an immoral product.


Too bad animal protein increases calcium (and other mineral) excretion so your body can't use all that calcium [1].

That's also 1/3 of your saturated fat in a single glass.

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6566930/


Are you implying cow's milk supports biodiversity? Because it absolutely doesn't. In fact, animal agriculture is the leading cause of biodiversity loss.

https://www.unep.org/news-and-stories/press-release/our-glob...


The vast vast vast majority is for animal farming. It's staggeringly inefficient.


This is very surprising to me. I've got a kindle from 2013 and never had any issue with unsupported books.

Is yours super older or what?


There are some books that just straight up are not supported on kindles or only on Kindle fire editions. Looking it actually recently changed, but "Operating Systems: Three Easy Pieces," you could buy in kindle format, but it would only work for the Kindle fire editions. Maybe it has gotten better, but I used to run into this a lot with textbooks. Would work on Kindle fires, but not paperwhite.


It's a Kindle Paperwhite. I think colour is usually the problem. Doesn't make sense to me either.


Colour?! I’ve never had an issue of my kindle with colour! It’s only black and white! How can Amazon screw up a black and white conversion?


Maybe I'm wrong. I kind of just abduced it because it was the only plausible reason I could think of. My kindle only supports black and white. And I figure newer models might have colour support?


The OS has a full-colour graphics library. It converts to black and white on the device. That's not the issue.


> Bluetooth for headphones so everyone doesn’t have to hear?

This is a critical missing feature. I would never ever use this unless it's in my ear alone.

And I hope it doesn't become socially acceptable to be carrying these around forcing everyone else to listen to whatever this device has to tell the user. There is already far too many noise and inconsiderate people in this world.


But how is the input side sufficiently compatible with any state other than being alone? Voice surely does not qualify?

Even gesture control would be a tough sell, and even that only if it's not "AR, where you push buttons projected across your field of vision" but "AR, where you can do the equivalent of gamepad buttons with hand movement anywhere the device can see the hand". Voice output (earbuds) would be far too slow for that kind of interaction, because you can't skim a list. Compared to the strictly sequential nature of audio, screens are the equivalent of embarrassingly parallel.

By the way, that slowness of voice output vs screen is also what I consider the true motivation companies had for creating those essentially free voice assistants: searching for product/service on a screen, even if it's just a small handheld screen, makes you pick from a list. With voice in the other hand, going through the list is so slow and cumbersome that the chances for just picking the first, "I'm feeling lucky", are much, much bigger. The value of placement (bought directly or bought indirectly, "this must be very relevant because we know how much they can spend on our other ad services") is just so much bigger with voice. Chances are people are less likely to listen to the second hit on voice than to go to the second page on screen.


But there are tickets that are only valid for certain providers?


That's true, to do that they use a different hack and we can actually (very expensively) route those too.

These tickets are valid only on a particular service (and connections), since the franchises run the services they can sell tickets for services they run.

Example from a journey I made near Xmas:

  0908 from Bingley to Leeds (Northern Rail)

  0945 from Leeds to Kings Cross (LNER)

  1309 from Waterloo towards home (SWR)
The three franchises get 100% of their part of these routes, and I'm notionally forbidden from, say, getting on an XC to zigzag South and avoid London altogether instead.


40% of the population is B12 deficient: https://eatingourfuture.wordpress.com/science-studies-vegan-...

So most people should supplement, not just vegans.


This directly contradicts the Wikipedia article on the subject [1], and in general the page you link looks more like pseudoscience than not. Do you have a better source, maybe from a published paper or the NIH?

1: https://en.m.wikipedia.org/wiki/Vitamin_B12_deficiency


Presumably referring to this sentence from the Wikipedia page you linked to, quote: "Marginal deficiency is much more common and may occur in up to 40% of Western populations.".


Is the online course and the book the same material? Trying to figure out if I need both or either.


The two online courses at Coursera are based on the First Edition of "The Elements of Computing Systems: Building a Modern Computer from First Principles": https://www.amazon.com/Elements-Computing-Systems-Building-P...

The most recent edition of this book is the Second Edition: https://www.amazon.com/dp/0262539802/

To quote from the Preface concerning what the difference between these two editions is:

"The Second Edition

Although Nand to Tetris was always structured around two themes, the second edition makes this structure explicit: The book is now divided into two distinct and standalone parts, Part I: Hardware and Part II: Software. Each part consists of six chapters and six projects and begins with a newly written introduction that sets the stage for the part’s chapters. Importantly, the two parts are independent of each other. Thus, the new book structure lends itself well to quarter-long as well as semester-long courses.

In addition to the two new introduction chapters, the second edition features four new appendices. Following the requests of many learners, these new appendices give focused presentations of various technical topics that, in the first edition, were scattered across the chapters. Another new appendix provides a formal proof that any Boolean function can be built from Nand operators, adding a theoretical perspective to the applied hardware construction projects. Many new sections, figures, and examples were added.

All the chapters and project materials were rewritten with an emphasis on separating abstraction from implementation—a major theme in Nand to Tetris. We took special care to add examples and sections that address the thousands of questions that were posted over the years in Nand to Tetris Q&A forums."


I'd recommend watching the course material and reading each chapter. It depends on a little luck which material clicks and how quickly, for me it varied from chapter to chapter whether or not I could get by with just the videos.


Im currently taking this course without having the book and it works great. I might buy the book later but for me it’s important to have the imposed weekly deadlines in order to not just drift away and do something else instead.


I did the course without the book. I haven’t actually looked through the book, but the Coursera class was definitely enough on its own.


I first tried the course many years back, and didn't complete it (not necessarily only because it was in course form). Last year I bought the 2nd edition book, and found it more accessible, as a do it on your own time type of project, and as a reference while implementing the parts.


Can you point me in the right direction so that I as someone that didn't know this exists up until now could learn enough to know what and where to buy?


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