illegibility

Look at a complex and confusing reality, such as the social dynamics of an old city

Fail to understand all the subtleties of how the complex reality works

Attribute that failure to the irrationality of what you are looking at, rather than your own limitations

Come up with an idealized blank-slate vision of what that reality ought to look like

Argue that the relative simplicity and platonic orderliness of the vision represents rationality

Use authoritarian power to impose that vision, by demolishing the old reality if necessary

Watch your rational Utopia fail horribly