Analisi strutturale e "omologia del produrre". Il metodo omologico di Ferruccio Rossi-Landi

Similarity (vs. difference) and constancy (vs. fluence) are two central categories in Rossi-Landi’s methodology used throughout the whole course of his research. In the first instance he identifies common speech (1961) as a fundamental object of study, and subsequently linguistic work (1965 and 1968), and again in another phase of his research (1972, 1978) – widening the field of common speech to common semiosis – social reproduction. In other words, Rossi-Landi passes from a methodica of common speech to a methodica of common semiosis that involves study of constancies in social reproduction overall.

相似性（与差异性相对）与恒常性（与流变性相对）是罗西-兰迪（Rossi-Landi）方法论中的两大核心范畴，贯穿其全部学术研究历程。在研究初期，他将1961年提出的日常话语（common speech）确立为核心研究对象，后续又深耕1965年与1968年的语言学研究；而在其研究的另一阶段（1972年、1978年），他将日常话语的研究场域拓展至普遍符号过程（common semiosis）——亦即社会再生产（social reproduction）领域。换言之，罗西-兰迪的研究从日常话语方法论转向了普遍符号过程方法论，其核心是对整体社会再生产中的恒常性展开系统探究。