Vegan comes to mind. Some AI haters go at it with the same mindset. If the glue of the label of the bottle of water is not animal free, the water is not vegan. And yes, there are non vegan water bottles. And there are some lemonades that are filtered with gelatine.
But I think it is the same dilemma for human assisted work. You have two people where one is designated the assistant. How much assistance can the assistant give, to have the work still count as being only assisted by the assitant. When do the roles switch and the designation who the assitant is, is only on paper.