According to Chapter 48 of Sai Satcharitra, what are some things that do NOT automatically qualify someone as a true Sadguru?

Chapter 48 of the Shri Sai Satcharitra clarifies that several common religious or scholarly practices do not, by themselves, define a Sadguru. The text states that wise people do not consider someone a Sadguru merely because they have studied the Vedas, possess knowledge of the six Shastras, or can explain Vedanta. Furthermore, practices like breath control (Pranayama), wearing heated marks (Taptamudra), or pleasing audiences with talks about Brahman are insufficient qualifications. Even giving mantras to disciples is not enough, as the teachings of such individuals are often described as "verbally hollow" due to a lack of personal, direct self-experience.