Prescience or Pattern recognition?

Recently finished reading the God Emperor of Dune. An interesting idea of a God emperor. Why a God? Leto II has collective memories of his ancestors. Also a startling measure of prescience. Will a startling degree of prescience project an image akin to God on rest?
Somewhere I read (It might be Sherlock Holmes stories or one of the countless other books I keep getting into) that future is essentially a combination of events already happened. In the sense that our collective memories should throw enough patterns that most of future events can be said to have been following one or the other pattern.
So then will someone who has immense collective memory, processing large enough to see patterns and draw projections based on similar patterns in past, achieve a degree of prescience also? Now I ain't saying that its the plot of the book. Just another thought that should such a trait occur, will we be considering the entity as someone in God mode.
Its unlikely that a human brain will achieve that kind of recall and processing, but some quantumesque computer sometime in future may. While maybe not creating events in physical world, such an entity may be able to very accurately forecast a lot of future events. All it will need is some acts and derive the patterns. Will it be a passive God to some or many?