What was Sai Baba's guidance regarding argumentation, and who did He say is unfit for self-knowledge?

In Chapter 2, Sai Baba gives a strong warning against engaging in dualistic explanations and argumentation. He advises devotees not to establish their own side or refute the other side, calling it a 'useless effort.' Baba explains that where there is a mind for argumentation, there is an abundance of ignorance and Maya, not a purity of self-interest. He explicitly states that a person filled with bad thoughts and false logic, who is prone to such debates, is not fit for self-knowledge. For such individuals, there is no happiness in this world or the next, only unhappiness everywhere.