The differential attention on more difficult concepts begins in the Team Readiness Assurance Test. During the tRAT, the teams will often vote on questions, accepting consensus when it exists and quickly moving on. On more difficult questions, where there is no simple consensus, they will discuss for a longer period of time. The length of the discussion is affected by the overall difficulty of the question and the underlying concepts. Each time the team selects an answer and does not find the correct answer, they return to the question for further discussion.