Who said "A question mark is all that remains of what we once knew."?

This quote is attributed to Riddler.

A question mark is all that remains of what we once knew. - Riddler

"A question mark is all that remains of what we once knew."

Riddler Knowledge

"Riddles are the most honest form of communication - they demand truth wrapped in mystery."

"A mind that cannot solve a puzzle is a mind that cannot live."

"Questions are the doorway to knowledge, answers are merely the threshold."

"The greatest riddle is why people fear enlightenment."

"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."