It makes use of countable nonstandard models of Peano arithmetic. Nonstandard abbreviations were and are often used. There is only one possible order type of a countable nonstandard model. It is natural to ask whether a countable nonstandard model can be explicitly constructed. Nonstandard, informal and archaic forms are in "italics". In certain nonstandard variations of the IPA, the uppercase form is used. Eye dialect is the use of nonstandard spelling for speech to draw attention to pronunciation. "nu"cular"" as a variant but nonstandard pronunciation of nuclear. The real numbers are either standard or nonstandard. In the Japanese writing system, are obsolete or nonstandard hiragana. Unusual or nonstandard readings may be glossed using furigana. He is interested in the philosophy of science, knowledge representation, nonstandard logics, and learning. A similar distinction between palatal and alveolo-palatal exists in some nonstandard forms of Malayalam. Yet other systems accept classical logic but feature a nonstandard membership relation. In nonstandard analysis, continuity can be defined as follows.