Title: Printed circuit board.
Question: What's the minimum amount of copper a layer in a PCB can have to be considered "heavy copper"?

Title: Protestantism.
Question: What is the term to describe using only faith for justification?

Title: Samurai.
Question: Who did Tom Cruise play in The Last Samurai?

Title: FC Barcelona.
Question:
What famous cleric was a supporter of Barcelona?