In contrast to the avoidance of issues, which does not deny their significance but merely ensures that they are not dealt with, the evasion of issues uses various devices to avoid recognition of the existence of the issues. In social systems this takes the form of the refusal to accept the validity of certain forms of information, to the point of ensuring that such information is suppressed. Typically such evasion needs to be disguised or covered up, because if known it can relatively easily become the focus of extended public criticism, especially in the media. It may well be criminal but tends to be considered highly unethical. In individuals evasion may also take the form of repression of memories.