How did Sai Baba demonstrate his omniscience in his interactions with Damu Anna regarding his business aspirations?

Sai Baba demonstrated his omniscience by responding directly to Damu Anna's unspoken thoughts. When Damu Anna mentally considered a partnership, Baba replied out loud, "We are not in anything (partnerships), Bapu." Later, when Anna silently contemplated a different trade in grains, Baba immediately countered with, "You will buy five seers and give seven seers," indicating a future loss. Chapter 25 highlights this ability, stating that the secret thoughts of every living being are known to Baba and that the past, present, and future are as clear to Him as an 'amla fruit on His palm.' This incident shows how He cautions His devotees at the right time to ward off calamities.