Here's another unfinished sentence I wrote and some responses it elicited in December 1988:
Illogic is best exemplified by...
...love, with few exceptions. (Fran H.)
...the teachings of adults, who by means of college, feel they hold the key to knowledge, yet they have no idea how to get (the key) off (of) the key chain and open the door for anyone else. (Chris E.)
...spending years learning the derivative of x-squared minus 2x and then not knowing how to change a tire. (John H.)
