> I've talked with perfectly otherwise intelligent friends who didn't know that on Facebook Messenger, clicking the Phone icon on the top-right of the screen th

> I've talked with perfectly otherwise intelligent friends who didn't know that on Facebook Messenger, clicking the Phone icon on the top-right of the screen that's present in every single chat view allows you to have a voice call with the person in the chat. My friend, there are a lot of icons in every program. When the smart developer relies on the stupid user (emphasis mine) to guess what he wants without bothering to put a text label or a tooltip describing the role of the button don't expect wonders. And since "material design" it is really difficult to say if an UI element is a button, or a label or just a decoration without clicking on it and opening the Gates of hell. > It could not get more obvious than this. Some people just need to be taught. They will never discover on their own. There was a saying "The only intuitive interface is the nipple". Some people with children say it's an overstatement.