Final answer:
The final conclusion of Dobkin de Rios' work with the Visionary Vine is not provided in the given information.
Step-by-step explanation:
The final conclusion of Dobkin de Rios' work with the Visionary Vine was not provided in the given information. In order to determine the final conclusion, it would be necessary to refer to Dobkin de Rios' actual work and research on the Visionary Vine. Without further information, it is not possible to provide a specific answer to this question.