“He saw no point in complaining to the union because, in his experience, the union acted in collusion with the management.”

“There isn't a secret collusion to create or prolong chronic diseases as some paranoid conspiracy theorists would like you to believe.”

“An independent, non-official inquiry exposed a collusion between the management and the police.”

“By designing the primitive binary code, at least one colluder can be captured out of up to c colluders.”