What are some common practices or characteristics that Chapter 48 explicitly states are NOT sufficient to define someone as a Sadguru?

In its exploration of the nature of a true spiritual master, Chapter 48 of the Sai Satcharitra lists several attributes that, by themselves, are insufficient to qualify someone as a Sadguru. The wise do not confer this title upon those who merely study the Vedas, explain Vedanta, control their breath through Pranayama, or wear heated marks (Taptamudra). Even giving pleasing talks about Brahman or dispensing mantras from scriptures without any certainty of the outcome is not enough. The chapter emphasizes that vast verbal knowledge without the backing of direct self-experience is considered "verbally hollow."