並不是不可以。

Not that it's not possible.

Not that it's unacceptable.

Source: Tatoeba

Sentence Composition

1 並不 bìngbù not at all; by no means
=2 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=2 是 shì variant of 是 shì
3 不可以 bùkěyǐ may not