Misses the point. So let's say Bob and Sue each spend sixteen hours a day in conversational English. They're exactly as intelligent and exactly as apt as each other. If you test them, you'll get the same scores. Now let's switch Sue to French for two hours a day. Same amount of effort, all else held equal. Bob is going to get fourteen more hours a week speaking English than Sue is. Sue is going to know a lot more French than Bob - but Bob will have an advantage. Obviously, there's a lot of variables here. Obviously, education isn't linear. If Bob and Sue are graduate students, you likely won't see a difference - but if Bob and Sue are toddlers, you will. If your vocabulary is in the tens of thousands of words, the expansion is going to be barely visible. If your vocabulary is in the hundreds of words, however, it makes a difference. Never mind the spinning platters - the bus has limited bandwidth.Is human memory analogous to a hard drive, though?