There obviously is no sharp line (e.g. it is 37. Immediate question: why not 36?), but that does not matter at all. We already have the same fuzzy line for wri

There obviously is no sharp line (e.g. it is 37. Immediate question: why not 36?), but that does not matter at all. We already have the same fuzzy line for writing. Am I forbidden from ever reading other author's books because I might accidentally "generate exact copies" of some of the sentences? Clearly not, that is how people learn a language. Does that mean I am allowed to copy the whole book? Also clearly not. Where do you draw the line? Somewhere.