Possibly related to this request for an antonym for pleonasm except I want to know if there is a name for the grammatical construction or the process where (pseudo) redundant words are removed. The content is still interpretable, because there is a reasonable amount of redundancy in English (and other languages).
Inspired by this question where the phrase used is
"He looks like if John had no hair."
Two of the comments suggest this could be expanded, say "He looks like John would if John had no hair". I'd like to know if there's a generalised name for the process of getting from the expanded version to the reduced version.
This type of construction is common in Singlish (Singaporean English), where if you asked someone if they'd been for lunch, you might get the answer:
"Yes, go come back already."
Which could be expanded to "Yes, we have been for lunch and have already come back", except there's a lot of redundancy there.
Is there a name for reducing a phrase or sentence down to just the bare bones of meaning?