Screen 1 shows the Photos app on my iPhone, showing a photo of a steam locomotive. If I want to make some changes to the photo, I can tap the “Edit” button in the upper right corner to edit the photo.
In Screen 2, I’ve decided to crop the image, which is easy to do.
Maybe this photo doesn’t need to be cropped after all. In Screen 3 I can tap “Cancel” in the bottom left corner.
The App designers don’t want me to inadvertently lose any work that I’ve done. In Screen 4 the app presents a confirmation, with “Discard Changes” and “Cancel” as the options. Why yes! I do want to cancel!
Of course, the meaning “Cancel” has changed! Initially it meant “I don’t want to make these changes!”. Now it means “I do want to make these changes!” which is obviously a little confusing, as tapping cancel will leave me on the same editing screen that I actually want to leave.
A better pair of labels might be “Cancel, and discard changes” and “Continue editing”. There are probably plenty of others.
You don’t often see this kind of unclearly worded confirmation these days!