You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Sino-Tibetan_relations_during_the_Ming_dynasty

Context:
Historians disagree on what the relationship was between the Ming court and Tibet and whether or not Ming China had sovereignty over Tibet. Van Praag writes that Chinese court historians viewed Tibet as an independent foreign tributary and had little interest in Tibet besides a lama-patron relationship. The historian Tsepon W. D. Shakabpa supports van Praag's position. However, Wang Jiawei and Nyima Gyaincain state that these assertions by van Praag and Shakabpa are "fallacies".

Question:
Who did not agree with van Praag and Shakabpa?

Wang Jiawei and Nyima Gyaincain