This is brilliant! I completely agree with the premise: > I would frequently be familiar with one part of the source material, but have no way to skip it and o

This is brilliant! I completely agree with the premise: > I would frequently be familiar with one part of the source material, but have no way to skip it and only read the parts I was unfamiliar with. This makes for so much cleaner articles. It's actually a bit similar to what waitbutwhy.com is doing with tooltips. It might have some negative SEO implications (if you're worried about that) because if you hide a lot of content like that it could potentially be seen by search engines as keyword stuffing[0]. But if SEO is a secondary concern (which it should be for reasonable people not obsessed about rankings) then this is an excellent solution. Would love to see this more widely adopted. [0] While a 2k word article explaining something that could be explained in 200 words is not :facepalm: