（1） Non-impedimentary moral neutrality; one of the two kinds of morally neutral 无记 categories of mental functions， the other being impedimentary moral neutrality 有覆无记. Mental functions of neutral nature that does not hinder enlightenment. Pure nature， traceless nature. （aklis!t!a-avya^kr!ta;）. This concept was originally developed by the Sarva^stiva^dins 有部， who distinguished four kinds of non-impedimentary moral neutrality.