The action of processes by analogy can affect the language system in different ways. I. Analogy as a fact of language can transform its system from within, passing through the phase of asystemicity and constructing a new systemicity, resp. anti-systemicity. II. Analogy as a fact of speech may remain at the level of an asystemic fact to be avoided. As a result of the principle of contamination, asystemic word-use may also arise. Asystemicity as a result of analogy and as a consequence of contamination is also revealed in an oral scientific text.