I kind of wonder if there&#x27;s something else going on as well.<p>I mean, on one hand these categories are uncomfortably loose. Not just obviously made up ones like race or species. Things like molecules and galaxies are uncomfortably loose categories rather than actual things. Thingness seems to be a matter of degrees everywhere.<p>On the other hand, reality seems to make use of these close enough categories just like we do. It&#x27;s building stuff out of molecules, stars and galaxies. It&#x27;s evolving new species and problem solving using organisms and species despite the leaks in the abstractions.<p>I don&#x27;t think its just a matter of crutches for our puny human perception. Something fishy is ging on.