Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.

He and his twin brother are as alike as two peas in a pod.

He and his brother are as alike as two peas in a pod.

He has the alias 'Genius' because of his talent.

He cut the apple into exactly two equal parts.

His heart was broken in two.

This fruit is very delicious.