turn on the first rumor; and the only insert song of the series is named Kodoku no shigunaru, literally "signal of loneliness". Mental illness, especially dissociative identity disorder, is a significant theme in Lain: the main character is constantly confronted with alter-egos, to the point where writer Chiaki Konaka and Lain's voice actress Kaori Shimizu had to agree on subdividing the character's dialogues between three different orthographs. The three names designate distinct "versions" of Lain: the real-world, "childish" Lain has a shy attitude and bear pajamas. The "advanced" Lain, her Wired personality, is bold and questioning. Finally, the "evil" Lain is sly and devious, and does everything she can to harm Lain or the ones close to her. As a writing convention, the authors spelled their respective names in kanji, katakana, and roman characters (see picture). Reality never has the pretense of objectivity in Lain. Acceptations of the term are battling throughout the series, such as the "natural" reality, defined through normal dialogue between individuals; the material reality; and the tyrannic reality, enforced by one person onto the minds of others. A key debate to all interpretations of the series is to decide whether matter flows from thought, or the opposite. The production staff carefully avoided "the so-called God's Eye Viewpoint" to make clear the "limited field of vision" of the world of Lain. Theology plays its part in the development of the story too. Lain has been viewed as a questioning of the possibility of an infinite spirit in a finite body. From self-realization as a goddess to deicide, religion (the title of a layer) is an inherent part of Lain background. Apple computers Lain contains extensive references to Apple computers, as the brand was used at the time by most of the creative staff, such as writers, producers, and the graphical team. As an example, the title at the beginning of each episode is announced by the Apple computer speech synthesis program PlainTalk, using the voice "Whisper", e.g. say -v Whisper "Weird: Layer zero one". Tachibana Industries, the company that creates the NAVI computers, is a reference to Apple computers: the tachibana orange is a Japanese variety of mandarin orange. NAVI is the abbreviation of Knowledge Navigator, and the HandiNAVI is based on the Apple Newton, one of the world's first PDAs. The NAVIs are seen to run "Copland OS Enterprise" (this reference to Copland was an initiative