Diane Ravitch in Opinion Journal:
A college professor informed me that a new textbook in human development includes the following statement: "As a folksinger once sang, how many roads must an individual walk down before you can call them an adult." The professor was stupefied that someone had made the line gender-neutral and ungrammatical by rewriting Bob Dylan's folk song "Blowin' in the Wind," which had simply asked: "How many roads must a man walk down before you call him a man?"