Aperusteellinen

Aperusteellinen is a Finnish adjective used to describe statements, arguments, or theories that lack a solid basis or justification. It forms the negative counterpart to perusteellinen, which means thorough or well-founded. The prefix a- signals negation, while perusteellinen comes from peruste- meaning basis or reason, with the common adjectival suffix -ellinen. Thus aperusteellinen conveys that something is not well founded, not supported by evidence, or built on weak premises.

The term appears in critical discourse, journalism, and academic writing when assessing the strength of a claim. It can apply to a wide range of elements, including claims, interpretations, or analyses. In usage, it is often paired with calls for supporting data or clearer reasoning, underscoring the need for justification.

Esimerkkejä: "Tämä väite on aperusteellinen eikä sitä tue mikään luotettava todiste." "Aiempi analyysi oli aperusteellinen, koska se ei huomioinut olennaisia faktoja." The word is used in formal or semi-formal contexts, and its degree of seriousness can vary with tone and audience.

Related terms include perusteellinen (thorough, well-founded), perusteltu (justified), and perusteeton (baseless, without foundation). Aperusteellinen is part of a broader vocabulary for evaluating argument quality in Finnish.