Debunking "comprised solely of": why this phrase doesn't add up

What kind of error is it?

Redundancy error

Why do people make this mistake?

People often use "comprised of" thinking it is synonymous with "composed of", and adding "solely" seems to emphasize exclusivity. However, "comprise" itself inherently includes everything without needing "of" or "solely".

What is correct?

The word "comprise" should be used without "of" and without additional emphasis like "solely". It means "to consist of" or "to be made up of".