The philosopher Confucius was reportedly once asked what he would do if he were a governor. He responded that he would first "rectify the names" to make words correspond to reality, for "If language be not in accordance with the truth of things, affairs cannot be carried on to success, proprieties and music do not flourish."
I'm not precisely sure what the ancient Chinese sage meant by that, or what examples he may have had in mind, but I've thought one possible interpretation of this quote is that language must not be allowed to be abused in such ways that speech grows full of dishonesty and contradictions, or else there won't be a basis for efficient human action. Perhaps a kind of social equivalent to how free market economists talk about State central planners not being able to efficiently run an economy because they do not have access to accurate price signals.
These thoughts were provoked by an ad for Sprint cellphone service that I heard earlier this evening. In the ad, a man comes on and says something along the lines of, "Oh great, another wireless ad. You're probably sick of all these phone ads with all their confusing terms about their networks and offers and blah blah blah. But Sprint is going to do something different." Then he quotes a monthly price and basically says if you don't like it after a month you can have 100% of your money back, guaranteed. A few more details are conveyed in a similarly reassuring tone.