The problem of illiteracy is a serious social issue around the world.

She publicly acknowledged that she is asexual.

This is an unofficial meeting.

His behavior is illogical and incomprehensible.

His behavior was illogical and I couldn't understand it.

I thought he was angry, but that was not the case, he was just tired.

I want to meet him by all means.

This problem requires solving a nonlinear equation.

He's unpopular, but he's a very kind person.

Nonviolence is the best way to bring peace.