Who said "Clues are everywhere if you look hard enough."?

This quote is attributed to Scooby-Doo.

Clues are everywhere if you look hard enough. - Scooby-Doo

"Clues are everywhere if you look hard enough."

Scooby-Doo Knowledge

"Scooby-Dooby-Doo, where are you?"

"Ruh-roh!"

"Like, zoinks!"

"Let's split up, gang!"

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."