Stephen (Butler) Leacock, 1869-1944
was a Canadian economist and humorist
Advertising may be described as the science of arresting the human intelligence long enough to get money from it.
Mark Twain (Samuel Langhorne Clemens), 1835-1910
was an US humorist, novelist, short story author, and wit
Many a small thing has been made large by the right kind of advertising.
George Santayana, 1863-1952
was an US (Spanish-born) philosopher
Advertising is the modern substitute for argument; its function is to make the worse appear the better.