[ohfunkyeah]

Some days I think I'm smart, then I read stuff like this. I wish there was an EILI5 Plugin for chrome that I could use to tag any paragraph and someone would come along and break it down for me. I'd do it for your comment!

[yorwba]

Maybe the ELI5 plugin could be reasonably approximated by adding links to all phrases with corresponding Wikipedia articles, like:

https://en.wikipedia.org/wiki/Validation_set

https://en.wikipedia.org/wiki/Smooth_function

https://en.wikipedia.org/wiki/N-simplex

https://en.wikipedia.org/wiki/Preimage_theorem

https://en.wikipedia.org/wiki/Codimension

https://en.wikipedia.org/wiki/Submanifold

I guess it depends on whether you're willing to read a textbook's worth of Wikipedia articles. (There is no shortcut. Actual 5-year-olds also require a few years until they can understand advanced mathematics.)

[placebo]

You might be confusing "smart" with "knowledgeable". There's no way to be smart about concepts you haven't yet learned. And the ELI5 idea is cool - just need to find a business model :)