“Of course, there is some truth in...

“Of course, there is some truth in advertising. There's yeast in bread, but you can't make bread with yeast alone. Truth in advertising,” announced Lord Peter sententiously, “is like leaven, which a woman hid in three measures of meal. It provides a suitable quantity of gas, with which to blow out a mass of crude misrepresentation into a form that the public can swallow.”