Intuitive. Human beings are not born with much innate knowledge. What people mean when they use this word is that someone can infer from the information in a design what the purpose or intent of something is, based on all of the prior knowledge they’ve acquired in their life, including encounters with a long history of user interface conventions and domain concepts. That is not “intuitive,” but rather, closely mapped to someone’s knowledge.
I agree with this explanation of what intuitive is supposed to mean. There have been so many times where I've heard people say that "this product has such an intuitive design", and I've always wondered what that meant. I always thought intuitive meant easy to use and explicit, but I guess it doesn't. Information is only made sense of easily if the person understanding it has some level of previous knowledge that shapes their perception of the design. This part of the reading changes my perspective. I no longer think "intuitive" is a useful way of describing design because it's too vague and doesn't actually reflect what people are trying to say. Instead of saying a design is intuitive, I may use a different principle or explain what makes the information so easily understandable.