expressio unius est exclusio alterius
C2CEFR level
99/100Rarity: very rare
TechnicalRegister
Expressly naming one thing implies the deliberate exclusion of others left unmentioned.
They set out the force majeure events exhaustively, so expressio unius bars them from now adding pandemic to the list.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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