While we emphasize the significance of across-informant repeatability, it should be made clear that how much across-informant repeatability obtains 'statistically' would in principle be of little significance if we did not obtain within-informant repeatability, as will be discussed in chapter 3. We will consider in chapter 3 the idealized researcher-informant whose judgments would not be affected by any difficulty imposed by parsing or pragmatic considerations, very much along the lines of the idealization in Chomsky 1965: 3 in regard to "an ideal speaker-listener, in a completely homogeneous speech-community, who knows its language perfectly and is unaffected by such grammatically irrelevant conditions as memory limitations, distractions, shifts of attention and interest, and errors (random or characteristic) in applying his knowledge of the language in actual performance."