http://en.wikipedia.org/wiki/International_System_of_Units,
http://en.wikipedia.org/wiki/New_SI_definitions
http://en.wikipedia.org/wiki/Avogadro_constant#International_Avogadro_Coordination
http://en.wikipedia.org/wiki/Psi_(parapsychology)
http://syncnotes.blogspot.ca/2013/01/hacking-quantum-crystal-ball.html,
http://io9.com/person-of-interest-delivers-a-dark-weird-soon+to+be+cult+favorite-episode?tag=tv-recap,
http://io9.com/5982962/person-of-interest-does-a-pretty-good-facebook-satire?tag=tv-recap