Re: According to Mr. Orlowski
How exactly hard it is for you to grasp difference between using and reimplementing API ?
I like to think of this in actual book terms.
There is literally nothing stopping you from use the line "Harry stood on the platform at King's Cross" in a book, or writing a story about a boy wizard, or even writing a story about a student at a Scottish wizarding school who has to face a dark wizard.
But if you lift text directly from a Harry Potter book, then you're in for a bad time. Individual words, elements or lines are not copyrighted. The work as a whole however is.
A re-write or re-implementation of code is one thing. Copy-pasta including errata is quite another.