Sorry for the unsolicited feedback and I know that it was an example, but to me saying that in particular is quite rude.
If you did not understand what your peer said you would likely get a better response if you said you did not understand and try to ask a question to have it phrased in another way.
No apologies necessary: I generally try to be as generous as possible when interpreting people's words. In pretty much every case where I've actually done that the person I was talking to agreed that the words didn't quite match the intended message.
If you did not understand what your peer said you would likely get a better response if you said you did not understand and try to ask a question to have it phrased in another way.