Single-loop learning, according to Chris Argyris, is most appropriate when the environment is , goals and objective can be measured with a of certainty, and there is need for complex measures of performance.

Drugs have a high potential for abuse. there is no routine therapeutic use for these drugs and they are not available for regular use. they may be obtained for “investigational use only” by applying to the u.s. drug enforcement agency. examples include heroin and lsd. which scheduled drug is this?