Who said "We must challenge what we believe we know."?

This quote is attributed to Priest, Graham.

We must challenge what we believe we know. - Priest, Graham

"We must challenge what we believe we know."

Priest, Graham Education

Philosopher-Logician Australian Born 1948 (age 78)

"Contradiction is not inconsistency."

"A contradiction at the level of thought does not mean reality is contradictory."

"Logic is the study of the laws of thought."

"Paraconsistency allows for true contradictions."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."