What is an antonym for confused?

Here are some antonyms for confused, depending on the context:

General:

* Clear

* Certain

* Sure

* Understanding

* Composed

* Focused

Specific to situations:

* Enlightened (if confused by lack of knowledge)

* Calm (if confused by anxiety or stress)

* Organized (if confused by disarray)

* Decided (if confused by indecision)

The best antonym will depend on the specific situation and the reason for the confusion.