Дерсу Узала / Dersu Uzala / デルス・ウザーラ / Dersu Uzała

Exists the theory saying that Dersu never exist. For example write about it Simon Chapman and D J Clark.

"Did Dersu Uzala really exist? Was he just one man or, as has been suggested, a mixture of several hunter-trappers who guided the Russian explorer, Vladimir Arseniev over his three expeditions to map the mountains and forests of 'Ussuria' between 1902 and 1908. Arseniev's account of these expeditions is entitled 'Dersu the Trapper'. Everything we know about Dersu is from the explorer's point of view."

What My thinking about?
In the books of Arseniev: "По Уссурийкому Краю" and "Дерсу Узала" Dersu is absolutely one man. Person of Dersu is original, unique, compact. Arseniev with Dersu connected attachment of deep friendship. Arseniev in final don't understand wisdom of Dersu. His only write about. The theory have no bases in my opinion. Nonsense!