Uncertainty
There is nothing wrong with being uncertain.
In fact, it has often been said that the more a person learns, the less they're ever sure of. This shouldn't mean that students always lack confidence, but rather the opposite: that all stakeholders in education clarify that learning is a messy process chock-full of uncertainty, iteration and revision, and that anything tidy stemming from this untidy process should be questioned.
This shines a spotlight on multiple-choice questions, and not purely as an attack on them. There have been enough studies done to show that a well-written multiple-choice question actually measures understanding fairly well. But in the 21st century, change is happening at an incredible pace. Access to information is disrupting traditional processes and their related mechanisms.
Printed texts have gone from being the final word to simply one step in an endless chain of making information public. Texts are now merged with moving images, hyperlinked, designed to be absorbed into social media habits, and endlessly fluid. From an essay to a blog post, an annotated YouTube video to a STEAM-based video game, a tweet to digital poetry, the seeking and sharing of ideas is an elegant kind of chaos.
As a result, media are more dynamic than ever before -- and thus a bit "uncertain" themselves.