This is simply conflating terms, though. If your field re-defines a commonly used term to mean something very precise, obviously you're going to encounter prob

This is simply conflating terms, though. If your field re-defines a commonly used term to mean something very precise, obviously you're going to encounter problems when you try work backwards. "Tree" in the meaning of "some phylogenetic categorisation that contains elements x, y, z" may not exist in biology, but "tree" in the meaning of "big leafy thing made of wood" exists as sure as anything. Drawing lines is for scientific language, not general-purpose language.