Interesting read. It's just something I got thinking about while working on my final project for my Java class. Namely, to paraphrase from Alice in Wonderland, it's easier to have more than it is to have less. From a design standpoint, it's easier to understand addind two random amounts than to add or subtract 2 different amounts. The fun thing is, both methods, either average +/-10% 2 times or minimum +25% 2 times would yield the same results.