Try what out training instructor does when he is teaching BIB to new recruits. He draws a simple rectangle and asks them to describe the 4 sides of the rectangle. We usually get answers like front, back, left, and right. Then he goes on to note that a block to only one of those is a BIB.
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"It's easy to get the players, Getting 'em to play together, that's the hard part." - Casey Stengel
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