Final answer:
Ah Fo's ability to read minds reveals Tuan See's true feelings and the theme of envy in their friendship.
Step-by-step explanation:
In the short story 'The Three Brass Pennies,' Ah Fo's ability to read minds reveals that Tuan See has never liked him.
This revelation showcases the true nature of their friendship, or lack thereof. It suggests that Tuan See has harbored negative feelings towards Ah Fo all along, despite any outward appearance of friendship.
This revelation also highlights the theme of envy in their relationship, as each man envies the other for his intelligence. Ah Fo's ability to read Tuan See's mind uncovers the resentment and jealousy that has been simmering beneath the surface, adding a layer of complexity to their friendship.