Do I need to name a source (a website for example), which lists grammar rules for a language? I would like to know if this is considered one of these goods, which cannot be owned and thus needs no quotation.
For example a website lists prepositions, which cause a specific casus in a language. If I take those prepositions and list them in a document for that casus, do I then have reference a source, or can I assume this to be something not owned by anyone?
What about example phrases? They're also part of daily language and should not be owned by anyone.
Don't get me wrong, I have no problem with having to quote, but I'd probably prefer inventing my own example phrases and such. I don't lack the creativity.