Perustellisiin

Perustellisiin is a Finnish inflected form of the adjective perustellinen, which means well-founded, substantial, or justified. It is the illative plural form, used to modify a plural noun in the illative case. In practice, it appears in phrases where the speaker refers to things directed toward or characterized as well-founded, such as arguments, evidence, or points of discussion.

The form is typically found in formal or academic writing. It serves to qualify a noun phrase as possessing solid justification or evidence. Because it is an inflected adjective, perustellisiin always accompanies a noun in the illative case, and the exact endings agree with the noun it modifies.

Common contexts for perustellisiin include discussions of arguments, claims, or grounds that are considered justified or evidence-based. For example, it can appear in phrases like perustellisiin väitteisiin or perustellisiin argumentteihin, meaning “to the well-founded claims” or “to the well-founded arguments,” respectively. The usage emphasizes the quality of justification, rather than mere assertion.

It is important to note that perustellisiin is not a standalone noun; it functions as an adjective form that must link to a noun in the illative plural. It is one of several related forms derived from perustellinen, used to convey nuanced judgments about justification and evidence in Finnish text.

See also: Finnish grammar, illative case, adjectives in Finnish.