Altered Quote of the Day

For the last few weeks, I've been using the following quote as my e-mail signature line:

"To err is human, but when the eraser wears out ahead of the pencil, you're overdoing it." -Josh Jenkins

My friend Wendy Kay sent along this gem, which I suppose is equally valid:

"To err is human, but when the eraser wears out ahead of the pencil, you're doing calculus."

Beautiful.