Can you tell me about the devotee named Shankar and why Baba was displeased with him?

Based on the provided source chunks from Chapter 2, there is no mention of a devotee named Shankar. However, the text does elaborate on the type of behavior that displeased Baba. It cautions against having a 'mind for argumentation,' which is associated with ignorance, Maya, bad thoughts, and false logic. Chapter 2 notes that a person with such a disposition is not fit for self-knowledge. The author even describes his own initial state as being 'cynical, and critical' and 'prone to argumentation' before he surrendered to the Satguru's greatness.