JLPT N1
～ないことはない
it's not that ~ isn't possible; it is somewhat possible
Structure / Usage
Verb (ない-form) + ことはない / こともない
Example Sentences
食べられないことはないが、あまり好きではない。
It's not that I can't eat it, but I don't really like it.
できないことはないけど、時間がかかるよ。
It's not impossible, but it'll take time.