W.C. Sellar

"I read Shakespeare and the Bible, and I can shoot dice. That's what I call a liberal education." Tallulah Bankhead.

"When I give a lecture, I accept that people look at their watches, but what I do not tolerate is ...when thay raise it to their ear to find out if it stopped." Marcel Achard.

Now could someone please find me the exact wording of 'do not write on both sides of the paper at once.'? Thank you.