Many theorists (e.g. Lazarus, 1982) consider affect to be post-cognitive: elicited only after a certain amount of cognitive processing of information has been accomplished. In this view, such affective reactions as liking, disliking, evaluation, or the experience of pleasure or displeasure each result from a different prior cognitive process that makes a variety of content discriminations and identifies features, examines them to find value, and weighs them according to their contributions (Brewin, 1989). Some scholars (e.g. Lerner and Keltner 2000) argue that affect can be both pre- and post-cognitive: initial emotional responses produce thoughts, which produce affect. In a further iteration, some scholars argue that affect is necessary for enabling more rational modes of cognition (e.g. Damasio 1994).