1. 規定されたか外形への慎重な固守の実行(the practice of scrupulous adherence to prescribed or external forms)
2. 内容よりも形式的な構造を表現するべきとする主義(the doctrine that formal structure rather than content is what should be represented)
3. 形式的(論理的数学的)な所説は意味を持たないが、その象徴(物理的な存在と考えられる)は、有益な教訓を示しているという哲学的理論(the philosophical theory that formal (logical or mathematical) statements have no meaning but that its symbols (regarded as physical entities) exhibit a form that has useful applications)