Why can Kong Ming know the past and the future?

To tell the truth, Zhuge Liang was deified by The Romance of the Three Kingdoms. There is no such thing as borrowing an arrow from a straw boat or borrowing an east wind. In the official history, there is also the Romance of the Three Kingdoms, which is fictional. As for knowing the past, I think it is because Zhuge Liang studied gossip and was able to predict divination, knowing when he died, when he changed these things and how to stop them from happening. Of course, these are all my own ideas. Besides, I think divination is unreliable. Zhuge Liang can help Liu Bei gain hegemony by defeating others with his own strategy and wisdom, not by those circuitous ways!