As I&#x27;ve stated in my comment there are more than enough examples where that definition of species is lacking - it&#x27;s not a line&#x2F;plane&#x2F;SVM-hyperplane.<p>Evolution is gradual, there are no big species jumps.<p>What was there between sapiens and erectus, X? What was between sapiens and X, and X and erectus, Y and Z?<p>What was then between sapiens and Y, Y and X, X and Z, Z and erectus?<p>This can go on forever, evolution is by nature gradual, lets say it in your terms, a regression is more suitable than classification.<p>What point in this finely continous line do we pick for discrimination? Speciesism discovered!