a) Truthfulness in Advertising

15. Even today, some advertising is simply and deliberately untrue. Generally speaking, though, the problem of truth in advertising is somewhat more subtle: it is not that advertising says what is overtly false, but that it can distort the truth by implying things that are not so or withholding relevant facts. As Pope John Paul II points out, on both the individual and social levels, truth and freedom are inseparable; without truth as the basis, starting point and criterion of discernment, judgment, choice and action, there can be no authentic exercise of freedom.24 The Catechism of the Catholic Church, quoting the Second Vatican Council, insists that the content of communication be "true and — within the limits set by justice and charity — complete"; the content should, moreover, be communicated "honestly and properly."25

To be sure, advertising, like other forms of expression, has its own conventions and forms of stylization, and these must be taken into account when discussing truthfulness. People take for granted some rhetorical and symbolic exaggeration in advertising; within the limits of recognized and accepted practice, this can be allowable.

But it is a fundamental principle that advertising may not deliberately seek to deceive, whether it does that by what it says, by what it implies, or by what it fails to say. "The proper exercise of the right to information demands that the content of what is communicated be true and, within the limits set by justice and charity, complete. ... Included here is the obligation to avoid any manipulation of truth for any reason."26