Posted: Mar 22, 2015 2:41 pm
Yes, it's bloody brilliant, is ptable.com. Been telling my students to use it for years. A lot of effort has gone into that.
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=2197350#p2197350