Scientology auditing that has a preclearmock up a mass in front of him and shove it into his body, and mock up another mass in front of him and throw it away, over and over. When the processhas been done thoroughly and completely, the preclear should be able to reject or accept, at his own discretion, anything in his environment as well as anything in his engram bank. —9th ACC Volume 3 Approved Glossary