A sense of what is acceptable and what <is> not.

[JJXR]

Hello to all,

Thanks for reading my post.


Sample sentence:

A sense of what is acceptable and what <is> not.

Question:

Is the bolded "is" required?


Thanks a lot for any comments, corrections or suggestions!

Regards,
JJXR

 

[lingobingo]

It’s not 100% essential, but I think 99% is close enough.

A sense of what is acceptable and what not.
A sense of what is acceptable and what’s not.

 

[JJXR]

Thanks lingobingo.