### Anatomy of a manuscript

I received a short manuscript a few days ago. Now I have read it, and I'd like to summarize its content.

Theorem 1. Blah blah blah

Lemma 1....
Proof. Similar to [4]

Lemma 2....
Proof. Similar to [4].

Proof of Theorem 1. The proof follows from Lemma 1 and Lemma 2.

I would have liked to write down the following report:

Question: is it true that the authors of [4] wrote your paper as well, but you did not notice?