The issue focused on people's speech in an earlier age, as people were less likely to say "I don't know" and "I don't know the answer to that."

The students do not use the website to record their knowledge.

Pritchard said the policy was also important to make sure that people who were using the site said they were part of a community.

"It's so important to us to make sure that this is an experience that we can use to help people