Even if it’s not intentional, there are a lot of assumptions we make about our users – everything from which devices they use to access our applications to what kinds of characters are included in their names. And guess what: our assumptions are usually wrong. Like…really wrong. Sometimes this creates laughable situations, but other times it causes a lot of unintentional harm. In this talk, we’ll discuss some of the most common (wrong) things that we, as developers, believe about our users and how we can shift our assumptions to create software that’s better for everyone.