Permissions and Acknowledgments
- Anderson, John : The picture of Anderson is used courtesy of the University of Sydney.
- Dummett : The picture of Dummett is used with the permission of Robert S. Kissel.
- Imagery and Imagination : The initial photo of the Grand Canyon was taken by Jim Gordon from Biloxi, MS, USA in 2008. It is licensed under the Creative Commons Attribution 2.0 License.
- Knowledge Argument : The picture of Frank Jackson is (c) D H Mellor 2005, and used with permission of Mellor.
- Rahner :”Karl Rahner by Letizia Mancino Cremer” by Andy Nestl – Own work. Licensed under CC BY-SA 3.0 via Wikimedia Commons – https://commons.wikimedia.org/wiki/File:Karl_Rahner_by_Letizia_Mancino_Cremer.jpg#/media/File:Karl_Rahner_by_Letizia_Mancino_Cremer.jpg
- Santayana : The picture of Santayana is used with permission of James Turnure.
- Thick Concepts : Disclaimer: The viewpoints expressed in this article do not reflect the official positions of the U.S. Air Force Academy or any other government agency.
- Truth : The picture of Tarski is used with permission of the editor of the Polish Philosophy Page at: http://www.fmag.unict.it/PolPhil/Tarski/Tarski.html
- Zizek : The photographer is Mariusz Kubik.