Every specific semiotics (as every science) is concerned with general epistemological problems. It has to posit its own theoretical object, according to criteria of pertinence, in order to account for an otherwise disordered field of empirical data; and the researcher must be aware of the underlying philosophical assumptions that influence its choice and its criteria for relevance. Like every science, even a specific semiotics ought to take into account a sort of 'uncertainty principle' (as anthropologists must be aware of the fact that their presence as observers can disturb the normal course of the behavioral phenomena they observe). Notwithstanding, a specific semiotics can aspire to a 'scientific' status. Specific semiotics study phenomena that are reasonably independent of their observations.