You wouldn't think that a four-wheeled car would go faster if one of its wheels didn't touch the ground. Or if its axles were bent. Or if it was designed to grind against a wall. But you'd be wrong, and here's the science to prove it.
Can't remember those short cuts your children showed you on the computer? Here is a chart entitled the Essential Keyboard Shortcuts (grouped by type) that has the most commonly used computer shortcuts.