 He claimed that, in such a situation, it is impossible "in principle" to be absolutely certain of the meaning or reference that a speaker of the indigenous peoples language attaches to an utterance.For example, if a speaker sees a rabbit and says "gavagai", is she referring to the whole rabbit, to the rabbit's tail, or to a temporal part of the rabbit.All that can be done is to examine the utterance as a part of the overall linguistic behaviour of the individual, and then use these observations to interpret the meaning of all other utterances.