First, preemptive and preventive uses of force are often justified by claiming either that there is substantial risk of a future attack or that it is difficult to ascertain how dangerous the target is.
Short-Term Memory: Up to 7 Items, But Highly Volatile. Many psychology experiments have shown that our short-term memory can hold only a limited number of separate items. The average is about 7 items, plus or minus 2, depending on the individual. You can easily confirm this by reading someone a series of words that have no connection with one another, then asking this person to repeat them.
When you find the answer, it will stick in your brain a lot better. Read a CHUNK. Not a chapter, not even a page, read a pragraph or two. Your short term memory holds seven things for a thirty seconds or so. Anything you read in the last thirty seconds in all you have.