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certain; sure; no doubt
reliable; dependable
彼が犯人であることは間違い無い。
There is no doubt that he is the culprit.
この道で間違い無いか地図で確認した。
I checked the map to make sure this road was correct.
あの店の料理が美味しいのは間違い無い。
The food at that restaurant is definitely delicious.