Epistocracy, has many different conceptions but the core idea is that the vast majority of individuals do not have necessary political knowledge for participating in decision-making process.
In this theory, citizens should pass a competence test in which they answer questions about government structure of their country, basic principles and theories in political science, economy, and sociology.
If they manage to answer more than half of the questions, they will possess political rights, let us say, for the next five years. If they fail, they will have a second or a third or more chances until the next election.
Another method will be to distribute various number of votes to individuals based on their knowledge. For instance, if somebody correctly answers 80 questions out of 100, that person will have 0.8 vote instead of 1.0.
In this regard, whether we give full 1.0 vote for a person who passes a test or we proportionately distribute votes in accordance with the correct answers, in a perfect epistocratic system, every adult citizen will be knowledgeable and they all will possess political rights.
I personally like this concept as it rewards political literacy and will lead to better overall results in the quality of candidates we have as well as (hopefully) better government function.