Scientific and technical communication to the public suffers not from
problems of magnitude but from impediments to its production and consu
mption, especially inaccuracy, distortion, and deception. The author d
escribes how ambiguity self-interest, and exaggeration, for example, i
nfluence production quality, and how such factors as existing audience
bias lack of trust in scientific evidence, and resistance to change f
urther complicate assimilation of messages about science.