Answered By: Gabe, Research & Writing Studio Last Updated: Jan 14, 2016 Views: 153
Some information is considered common knowledge. How do you know if something is common knowledge? Historical dates and established scientific principles are common knowledge. You do not need to cite facts or ideas that are common knowledge in the field you are studying, as long as you express them in your own sentences. If you are in doubt as to whether something it common knowledge cite it!