How did Sai Baba use the offering of grapes to demonstrate his omniscience to multiple devotees simultaneously?

The episode with the grapes demonstrates Baba's intricate way of addressing individual needs and thoughts. According to Chapter 35, Kaka brought grapes with seeds as an offering. When Baba distributed them, he was aware of each person's inner state. For Boss Dharamsee, who was silently doubting Baba's abilities and disliking the seeded grapes, Baba miraculously transformed his portion into seedless ones. This directly addressed Dharamsee's internal conflict. Simultaneously, Baba gave the same grapes to Babasaheb Tarkhad, but his grapes remained with seeds. When Dharamsee later asked Tarkhad about his grapes and learned they had seeds, it further solidified the miracle for him, proving the experience was tailored specifically to his own mental state.