weasely contradictory and unsuported It has no generally accepted definition    It makes no sense to define the topic in sentence  and then say it has no definition in sentence     The references dont seem to say that it has no accepted definition One reference is about what teachers think mathematics is interesting but not relevant and the other says no consensus has been reached about whether mathematics is a natural science a branch of the humanities or an art form Something can obviously have a definition while being hard to categorize  I understand the first paragraph has been extensively discussed but this second sentence is terrible I have no opinion on the first sentence