I just notice a common pattern in a lot of these answers * First, give a definition * then some basic examples to clarify the concept * then some advanced us

I just notice a common pattern in a lot of these answers * First, give a definition * then some basic examples to clarify the concept * then some advanced usage to demonstrate the advantages. I tend to do it myself, maybe because a math concept has a clear definition and math courses do it too. However, it scares away a lot of people, including myself when I'm on the receiving end.