Your intuition that “He thinks logically in this matter” is the cleaner expression is quite accurate, because it points to an action and a context, whereas “a logical man” is indeed a fossilized and gendered label.

In Turkish, “Bu konuda mantıklı düşünüyor.” is semantically more precise, as it evaluates a specific performance of reasoning in a given situation, while “mantıklı adam” has become a generalized character label. Likewise, in English, there is a clear distinction between describing a particular act of reasoning and reifying that into a stable character type.

The question “Why do we say ‘mantıklı adam’ but almost never ‘mantıklı kadın’ in Turkish?” directly exposes a deep asymmetry in the language. Many positive evaluative person‑type expressions are constructed around “adam”: “adam gibi adam”, “ağırbaşlı adam”, “mantıklı adam”, “adam akıllı”, and so on. This pattern reflects a historically patriarchal social structure, where the unmarked norm of “the human” is expressed through a male‑coded noun. Woman, in this linguistic configuration, is marked, secondary, and often not the default bearer of generalized positive human traits.

For this reason, “mantıklı kadın” is grammatically possible but feels less idiomatic and less lexicalized than “mantıklı adam”. The latter functions almost as a ready‑made social type, while the former sounds like a more ad hoc description. In everyday Turkish, speakers frequently say “kadın çok mantıklı” (the woman is very reasonable), but “mantıklı kadın” lacks the same degree of entrenchment as a fixed label. This is a typical instance of gender asymmetry in language, where positive human ideals are encoded primarily in masculine forms.

From the standpoint of logic as a science of thinking, this is a revealing tension. On the one hand, logic is defined as a neutral, formal discipline concerned with the validity of inferences, independent of the thinker’s individual characteristics. On the other hand, in everyday language, the adjective derived from “logic” (“mantıklı”) is embedded in gendered, socially saturated expressions such as “mantıklı adam”. Thus, the scientific concept of logic is appropriated into common speech in a way that both extends and distorts it: it is extended to cover stable personality traits, and at the same time constrained by a culturally coded, male‑centered image of the “reasonable subject”.

If one aims for a more inclusive and conceptually accurate usage, it becomes preferable to shift from gendered, type‑like labels (“mantıklı adam”) to more neutral formulations such as “mantıklı bir insan”, “makul biri”, or context‑bound assessments like “bu konuda mantıklı düşünüyor”. Such alternatives preserve the evaluative content of “mantıklı” without binding it to a particular gendered social archetype.

Would you like me to now recast this whole argument in a compact, publishable English paragraph suitable for an article or essay?