The German entomologist Willi Hennig dived into between the barrels (today called cladistics)

The German entomologist Willi Hennig dived from objectivity to pure subjectivity, but found nothing but contradiction in accepting the idea of a single True Tree of Life (today called the class clade). Accepting this idea namely also means accepting paradoxes, when accepting paradoxes means denying a single True Tree of Life, and vice versa.The two simply can't make it up.

This fact ought not come as a surprise, since subjectivity, of course, can't be objective. Good old Willi thus dived into between the barrels, a dive that today is called cladistics.