What's the name of this construct - "We went to SuperFunTime, but it really wasn't"?
Where the missing clause is assumed to be a [a super fun time].
Or "Unfortunately, the elastic wasn't". Here it would be wasn't [elastic].
I did try to search, but if this has already been asked it's not easy (for me) to search for.
Ellipsis
https://www.lexico.com/en/definition/ellipsis
noun [plural =] ellipses
- The omission from speech or writing of a word or words that are superfluous or able to be understood from contextual clues. ‘it is very rare for an ellipsis to occur without a linguistic antecedent’