He has a wealth of scientific knowledge and is always excited about new discoveries.

He says 'knowledge is power' and studies hard every day.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

He is widely recognized as an intellectual in that field.

Did you know this trivia?

By learning a one-line fact every day, your knowledge will increase.

He thinks that war is a necessary evil.

He is a specialist in that field.