Yeah.. but if he didn't actually work exactly on it, but took the effort to learn from coworkers (or LLMs or google or wherever) and is able to answer my questions on what he did, and more importantly on why he decided to do something a certain way and not some other way, then he/she must have spent considerable amount of time actually learning about it and figuring things out. So I'd still hire him/her. The trouble is most people who embellish are either not competent to go deep enough to learn, or think that they can get away with some superficial knowledge of it.