Changes
added page url
<small>'''page url''': http://goo.gl/RKSprH + [http://goo.gl/RKSprH.info visitor statistics]</small>
* <strong>Fred Gifford</strong> // [http://www.philosophy.msu.edu/people/faculty/fred-gifford/ website], [http://philpapers.org/profile/45001 PhilPapers]
* <strong>Robert T. Pennock</strong> // [https://www.msu.edu/~pennock5/ website], [http://philpapers.org/s/robert%20pennock PhilPapers]
