"Pure ignorance" refers to a complete lack of knowledge or understanding about a particular subject or situation. It means someone is completely unaware and uninformed about something. Full definition
So many things in the past were explained as the work of a god out of pure ignorance only to later be scientifically explained by many observations, experiments etc.. (religion.blogs.cnn.com)
If you want to see pure ignorance and stupidity, click on the religious channels. (religion.blogs.cnn.com)
While I personally love eating around 2 big meals per day, it would be pure ignorance for me to say that everyone should be doing the same. (fitmole.org)