One of the reasons students in technical and professional writing classes are often unable to make judgments about the ethical worth of a piece of writing is that they lack an understanding of how connotative meanings are constructed. Socially oriented semiotic theories offer models of how language works symbolically in this way. A productive means of introducing these is to have students evaluate advertisements as forms of technical and professional writing. This study uses central ideas from Roland Barthes's essays on connotative semiotics as a rationale for directing writers to develop the critical reflex to analyze and then make judgments about the values implied by connotative systems.