One of the special of an erroneous conscience is ignorance. Ignorance occurs if someone is lack of knowledge or information about something, like a person is never taught the truth about a case of moral point at issue.
For an example maybe a person never have been taught to know that Showing off or hypocrisy, before others is a serious moral issue, so finally he does not understand why it was wrong to be a person hypocritical. and he think that they have done well action.
Ignorance in human turn to be destructive, instead of being constructive, human may lose what valuable capital he has such as knowledge, wisdom, and natural faculties.