> you're not making a great case for why people don't need to know what a sigma algebra is I can assure you most people that do stats / data mining / big data

> you're not making a great case for why people don't need to know what a sigma algebra is I can assure you most people that do stats / data mining / big data / machine learning do not know or do not remember any more what a sigma algebra is. > wouldn't it be swell if this is how we practiced medicine too? patient has early stages of atherosclerosis just do a triple-bypass or something, it just works. C'mon writing websites is not surgery. There are some people with deep knowledge required in the industry as a whole, but you really don't know to know much to write an app or a website, especially an internal corporate tool. And this is where most working hours are spent. It's the reality of things. I mean just look at the OP link. Do you think this is targeted at people that already know what a sigma algebra is?