Archive | Philosophy

Monday the 13th

If Friday the 13th is a bad luck day, does that imply that Monday the 13th is a good luck day? Compose a logical argument for this question. Whoever sends in the best logical argument, arguing either side of this question, wins a Singing Turtle reward. Read the post to find out the details.

eVersion of Algebra Survival Guide ARRIVES!

The award-winning Algebra Survival Guide is now available as an eBook. As such you can read it on any of these devices: Kindle, iPhone, iPad, Blackberry, Android, Mac or PC. Price of eVersion is just $9.95.

How to Use Definitions in Geometry

Definitions are TWICE as useful as standard theorems in geometric proofs. This post explains why, showing that definitions are, in a certain sense, very much like “reversible coats.”