In my sketch analogy, I left out "artistic license" and those who intentionally ‘draw' their art not only from Osensei's lineage, but also ‘how they like it' or from other arts. It seems to me that even these views can be informative as we trace how aikido was promulgated and purposely/accidentally changed, distorted, "progressed" or watered down by different teachers.
For a start, one thing that is easy to do is to work out how old someone was when the founder was alive and how long they could have trained with him.
Speaking from experience, I can relate my feelings about being an uchideshi and uke to the Founder, Morihei Ueshiba. Perhaps only those students who actually practiced with the Founder will truly understand my feelings. As full-time students of the Founder
Also are there any counter claims? It seems to me there are many who claim to be Osensei's last uchi deshi.