What does the phrase 「全部ダメダメなんでしょ？」mean?


These are part of the lyrics to a song and I just can't seem to figure out
what it means and what each of the words mean. Google translates it as "I
guess they are all bad." but trying to pick it apart I can't figure out what
each individual word means. Particularly the 「ダメダメ」 part which just translates
to "dame"...

I know 「全部」 means "all". Just a single 「ダメ」 means "no good". I'm just not
getting how all of it together means "I guess they are all bad."

Can someone help me by breaking this sentence down please?




First of all, you can find every part of the sentence in a dictionary.

>
> [全部](http://jisho.org/search/%E5%85%A8%E9%83%A8)[ダメダメ](http://jisho.org/search/%E3%83%80%E3%83%A1%E3%83%80%E3%83%A1)[でしょう](http://jisho.org/search/%E3%81%A7%E3%81%97%E3%82%87%E3%81%86)？

That said, `でしょう` [can be used in multiple
ways](https://japanese.stackexchange.com/a/1560/7705). The fact that there is
a question mark at the end of the sentence suggests to me that this is an
instance of the confirmatory usage (see #2 in the linked answer). That's also
likely why Google is giving you "I guess".

Additionally, you are simply not going to find some of words - such as `I`,
`they`, etc. from the English translation in the Japanese text because the
grammatical structure of the two languages are so different.

Realistically, `でしょう` by itself is likely accounting for both the verb `be`
(`are`) and the `I guess` in Google's output translation. `全部ダメダメ` has become
`they are all bad` because `I guess all bad` is not grammatical English.

Lastly, I want to caution you about taking Google translate too literally. It
is not a native speaker, and it is certainly not always right. It ultimately
just makes statistically informed guesses based on a lot of other translations
it has learned from. For particularly obscure uses of language which the
neural network is unlikely to have seen before, you can often do better with
common sense and a dictionary.




First of all, you can find every part of the sentence in a dictionary.

>
> [全部](http://jisho.org/search/%E5%85%A8%E9%83%A8)[ダメダメ](http://jisho.org/search/%E3%83%80%E3%83%A1%E3%83%80%E3%83%A1)[でしょう](http://jisho.org/search/%E3%81%A7%E3%81%97%E3%82%87%E3%81%86)？

That said, `でしょう` [can be used in multiple
ways](https://japanese.stackexchange.com/a/1560/7705). The fact that there is
a question mark at the end of the sentence suggests to me that this is an
instance of the confirmatory usage (see #2 in the linked answer). That's also
likely why Google is giving you "I guess".

Additionally, you are simply not going to find some of words - such as `I`,
`they`, etc. from the English translation in the Japanese text because the
grammatical structure of the two languages are so different.

Realistically, `でしょう` by itself is likely accounting for both the verb `be`
(`are`) and the `I guess` in Google's output translation. `全部ダメダメ` has become
`they are all bad` because `I guess all bad` is not grammatical English.

Lastly, I want to caution you about taking Google translate too literally. It
is not a native speaker, and it is certainly not always right. It ultimately
just makes statistically informed guesses based on a lot of other translations
it has learned from. For particularly obscure uses of language which the
neural network is unlikely to have seen before, you can often do better with
common sense and a dictionary.

