L: If lower levels are taken in isolation then the meaning of behaviour may be overlooked, this may lead to fundamental errors of understanding, and example of this misunderstanding comes from Wolpe who developed the therapy of SD, he treated one women with a fear of insects and found no improvement, it turned out that her husband, with whom she had not been getting along with had given an insect nickname so her fear was not the result of conditioning but means of representing her marital problems, the error was to focus on the behaviour level and ignore the meaning in the whole marital situation thus means that reductionist explanation can only ever form part of an explanation