This is probably the fundamental dimension of 'ideology': ideology is not simply a 'false consciousness', an illusory representation of reality, it i… - Slavoj Žižek

Ideological' is a social reality whose very existence implies the non-knowledge of its participants as to its essence - that is, social effectivity, the very reproduction of which implies that the individuals 'do not know what they are doing.

What we are thus arguing is not simply that ideology also permeates the alleged extraideological strata of everyday life, but that this materialization of ideology in external materiality reveals inherent antagonisms which the explicit formulation of ideology cannot afford to acknowledged.

The dead Lenin who does not know that he is dead thus stands for our own obstinate refusal to renounce the grandiose utopian projects and accept the limitations of our situation: there is no big Other, Lenin was mortal and made errors like all others, so it is time for us to let him die, to put to rest this obscene ghost which haunts our political imaginary, and to approach our problems in a non-ideological and pragmatic way. But there is another sense in which Lenin is still alive: he is alive in so far as he embodies what Badiou calls the 'eternal Idea' of universal emancipation, the immortal striving for justice that no insults and catastrophes manage to kill.

There is nothing in Lacan which is not stupid, no exceptions to stupidity, so that what makes him not totally stupid is only the very inconsistency of his stupidity.