I went to see a movie by myself.

Watching a movie alone is enjoyable.

He was called an unpatriotic person because of his actions.

She publicly acknowledged that she is asexual.

This is an unofficial meeting.

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

His behavior is illogical and incomprehensible.

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

This problem requires solving a nonlinear equation.

Nonviolence is the best way to bring peace.