_{This work is carried out in terms of functional linguistics and aimed at a disclosure of functional (pragmasemantic) non-linearity of speech based on Business English discourse with regard to its dubious nature. On the one hand, it is a systemically organized conventional discourse, while on the other, it is a dynamic and adaptive communicative type, within which partners have to build up lively, responsive sense space to succeed in achieving their goals. The authors proceed from the definition of non-linearity as a mutual influence of system components on each other in such a way that the synergistic effect of their coherent activities outperforms a meachanically obtained sum of separate effects. In reference to speech this postulate implies the postulate implies the emergence of 'new sense', that are not prone to manifestation by text elements on their own, outside the given discourse or in other combinations. The provided functional analysis of sample fragments of Business English shows that its pragmasemantic properties can not be actualized as merely linear ones, since in that case a significant amount of sense space would be ruined, and the text would lose its ability to function as an adequate speech act. The authors argue that communicatively viable discourse results from a combination of linear and non-linear relations between text components, as it is this combination that generates specific semantic accretions in discourse. In conclusion the authors state the necessity for representatives of different professions to look into the issue of discourse non-linearity and to make practical use of speech ability to bring forth non-linear functional effects. The authors see it as means of creating discourse sense space, with the latter being not only explicitly demonstrative of, but also implicitly assimilating, the desired pragmatic and semantic components. Elaborating this skill is undoubtedly helpful in enhancing business people's efficiency of speech activity.}