CSC153 2004S, Class 14: Pairs

Admin:
* HW2 graded and returned via email.
  * Feel free to grab me and ask questions about the grading
  * You have the option of redoing HW3 to meet those standards 
* Read "Vectors"
* Questions on the exam?
* Convo today!  I have little idea what it's about, but go anyway. 

Overview:
* Quick discussion of some issues from Monday's lab
  * See tally-vowels.scm
* Scheme, behind the scenes
* Pairs and pair structures
  * Silly Lisp/Scheme trivia
* Lab