Even if you can very precisely estimate fractions on the balls, and can very precisely aim at and hit them, that covers only a fraction of the cut angles needed to play pool. All the rest are varying degrees of less "defined" and more "estimated".If you have trouble looking at a simple object or shape (like a square or a rectangle or circle) and visualizing a vertical line down the center, then you have poor spacial skills and would not do well in anything that requires good spacial skills.
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