Useful refresher for sets and membership tables... and a lot more!

[textile]While solving a problem where a typical truth table wasn't going to do... I decided to map out the data conditions using venn diagrams... hadn't used the full notation for a while so decided to look it up and found "this useful link to information on sets, set notation, venn diagrams and membership tables":http://www.mathematicshelpcentral.com/lecture_notes/discrete_mathematics_folder/sets_venn_diagrams_and_membership_tables.htm .

I found "a more colourful representation of basic set notation and venn diagrams":http://www.purplemath.com/modules/venndiag2.htm too.

I now feel thoroughly refreshed!