5. Law of Proximity

The law of proximity indicates that objects, that are located close to each other are perceived as a group of objects. Principles of the law of proximity enable users to perceive the content easier at a glance. Even if the objects have strong differences, but are close to each other, visually they will be perceived as a group.

6. Law of Occam’s Razor 6/20

Occam's razor is a rule in science and philosophy, according to which, of several possible, equally complete explanations for something, the simplest one should be chosen. In design, this means adding complexity to the design only in case of exceptional need, so it is vital to analyze the interface and remove anything that might be extra, as long as the removal does not harm the interface. Getting rid of complexity, the interface will become more clear and efficient.

A good example is Apple. Steve Jobs' philosophy contained Occam's razor. His iPad and iPhone prove that: a single button on the front panel of a seamless standalone device. Google, which directs users' attention to its main function, is another one. Nothing extra.