Questions & Answers about Fallet är tydligt.
Because fall is a neuter noun in Swedish, and -et is the usual definite singular ending for many neuter nouns.
So:
- ett fall = a case / a fall
- fallet = the case / the fall
In this sentence, fallet is definite, so it means the case rather than a case.
Fall is an ett-word, meaning it has neuter gender.
You can see that from its indefinite form:
- ett fall = a case
This matters because Swedish adjectives often change form depending on whether the noun is common gender, neuter, or plural.