I'm looking at purchasing a used car in NYC which is about four hours from me so I ordered a mobile pre-purchase inspection and this is what the report shows me:

Anyways, I called the scummy prick used car dealer selling it, and he told me that he took it to his mechanic and they didn't find that report to be accurate or some shit.
So I guess what I'm asking is, is it possible incorrectly diagnose this? Because I would think this isn't really an issues you can have an opinion on, it either is leaking, or isn't leaking. Is there any room for judgement on this?
Thanks in advance if anyone is able to help me with this!

Anyways, I called the scummy prick used car dealer selling it, and he told me that he took it to his mechanic and they didn't find that report to be accurate or some shit.
So I guess what I'm asking is, is it possible incorrectly diagnose this? Because I would think this isn't really an issues you can have an opinion on, it either is leaking, or isn't leaking. Is there any room for judgement on this?
Thanks in advance if anyone is able to help me with this!