The problem with "Read the source, Luke" is that even if the code is well written (and that's a big if), reading the code only tells you _what_ it does, not wh

The problem with "Read the source, Luke" is that even if the code is well written (and that's a big if), reading the code only tells you _what_ it does, not why, not why it doesn't do it differently, nor what it may or may not do in the future. It's the difference between programming and software engineering.