Having trouble parsing this triple negative sentence


In my JLPT practise book, there is this sentence, which is designed to test if
one can track all the negations:

> その仕事{しごと}ほどおもしろくない仕事{しごと}はないのではないかと、私{わたし}は思{おも}った。

Up to `の`, I think it's saying, "there is no job as uninteresting as that
job." But then we hit `のではない`, and I get a bit lost. I feel like it's saying
"there is no job where there is no job as boring as that job," which doesn't
really make sense.

How do I parse this sentence so that I can understand whether the speaker
thinks `その仕事{しごと}` is interesting or uninteresting?




How about parsing it as this:

> 「『その仕事ほどおもしろくない仕事はない』のではないか？」と、私は思った。

... reading
[～～のではないか？](http://ejje.weblio.jp/content/%E3%81%AE%E3%81%A7%E3%81%AF%E3%81%AA%E3%81%84%E3%81%8B)
as a rhetorical question.

* * *

You can say
「[～(の)ではないかと思う](http://ejje.weblio.jp/content/%E3%81%A7%E3%81%AF%E3%81%AA%E3%81%84%E3%81%8B%E3%81%A8%E6%80%9D%E3%81%86)」(or
more colloquially
[～～(ん)じゃないかと思う](http://ejje.weblio.jp/content/%E3%81%98%E3%82%83%E3%81%AA%E3%81%84%E3%81%8B%E3%81%A8%E6%80%9D%E3%81%86))
to mean "I suspect that~~" or "I think it probably is~~".




How about parsing it as this:

> 「『その仕事ほどおもしろくない仕事はない』のではないか？」と、私は思った。

... reading
[～～のではないか？](http://ejje.weblio.jp/content/%E3%81%AE%E3%81%A7%E3%81%AF%E3%81%AA%E3%81%84%E3%81%8B)
as a rhetorical question.

* * *

You can say
「[～(の)ではないかと思う](http://ejje.weblio.jp/content/%E3%81%A7%E3%81%AF%E3%81%AA%E3%81%84%E3%81%8B%E3%81%A8%E6%80%9D%E3%81%86)」(or
more colloquially
[～～(ん)じゃないかと思う](http://ejje.weblio.jp/content/%E3%81%98%E3%82%83%E3%81%AA%E3%81%84%E3%81%8B%E3%81%A8%E6%80%9D%E3%81%86))
to mean "I suspect that~~" or "I think it probably is~~".

