You use this to say something is true. You might be a little surprised by it. It is like saying, "Isn't it?"
Noun + ではないかPrimary
な-Adjective + ではないか
You use this to say something is true. You might be a little surprised by it. It is like saying, "Isn't it?"
これこそが、我々が探し求めていた答えではないか。
This is the very answer we have been searching for, is it not?!
あの時の彼の言葉は、実は重要なヒントであったではないか。
His words at that time were actually a crucial hint, weren't they?
見たまえ、この庭園はなんと見事ではないか。
Look! Isn't this garden magnificent?
それは公平な判断とは言えないではないか。
That can't be called a fair judgment, can it?!
彼は無実だと主張するが、現場に指紋が残っていたではないか、と検察官は反論した。
He insists he is innocent, but his fingerprints were left at the scene, weren't they?, the prosecutor retorted.
How you say it changes the meaning. A falling voice means you are sure. A rising voice asks a question. It is like saying 'right?' at the end of a sentence.
This is like saying "isn't it?" but in a formal way. It is different from 〜じゃないか. That one is for talking with friends. This one sounds more serious. It is also stronger than 〜だろう. That one just asks for agreement. This one states something more firmly.
Use this when you want to show something is very clear. It is like saying "Isn't it obvious?" You can use it to share a new idea you just understood.
More formal alternatives(1)
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