In Abhidharma theory， the indeterminate mental functions， which do not have a determinable good or evil nature， and do not always act in concomitance with the mind in all of its states （aniyata^-bhu^mika）. These include reflection 寻， investigation 伺， sleepiness 眠， repentance 恶作， covetousness 贪， antipathy 嗔， pride 慢， and doubt 疑. Equivalent to this category in Yoga^ca^ra are the four indeterminate mental functions 四不定.