  In the present article we use the quantum formalism to describe the process
of choice under rational ignorance. We consider as a basic task a question or
an issue where the only answers are 0 and 1. We show that under rational
ignorance the opinion state of a person can be described as a qubit state. We
analyze the predictions that the quantum formalism give in the study of
rational ignorance. We find that answers to different uncorrelated questions
are contextual, that is they are influenced by the previous questions, even if
uncorrelated. Another interesting prediction is an uncertainty effect which
holds when we consider the statistical variance of two or more questions under
rational ignorance.
