[dragonwriter]

> Great code needs no comments.

Great code implementing a particular algorithm for a particular reason might want a comment (1) identifying the algorithm and providing a reference to a published description, and (2) identifying the reason the algorithm was chosen.

Great code that is clear and readable and well-fit to purpose can still, very often, benefit from comments. Not everything that might want to be made clear to readers of code can be expressed in the code.