Anthropologists are investigating the ancient Z'kali civilization that thrived in the Valtara region approximately 800 years ago, leaving behind minimal evidence. They intend to collaborate with the last few elders of the contemporary Valtara indigenous community, believed to be descendants of the Z'kali, to guide them to historical sites that might be remnants of Z'kali structures or ritual areas. The elders learned about these locations during their youth as part of their cultural education, and their understanding of traditional Valtara practices may assist in interpreting any sites discovered.

Which of the following is an assumption on which the success of the plan relies?