Iompaseo, the science is out there, you just can't be bothered to read it.
Not surprising, because there's a lot of it, and it consists of complex biochemistry. The authorities, for some time, have not denied (because they can't) the existence of fume events and their constituents. They are only arguing the legal technicalities of proving the connection between the events and the human consequences, just like the tobacco industry successfully did for years.
But then you probably still argue that there's no proven connection between smoking and lung cancer...