I think your reflecting your own insecurities and not thinking empirically. There is nothing to suggest this other than "attention" which I have just as easily countered; explaining how he got it would also cater "attention". This serves the purpose of both discrediting your opinion and also showing how arbitrary reasoning is a logical fallacy. I bet you are no more convinced by my counter argument than I am by yours, therefore it is a futile one. Suppose I find this armor and say the same thing, that I got it from an engram. I would also be an attention hogging liar? But if a million people found it in this way it would accepted as fact via what reasoning when by your logic they would all just be attention seeking liars. So by extension of that, why not any exotic engram? And in that case what prevents you from being an attention seeking liar for having ever found an exotic engram ever? Your word? Well in this particular case he also only has his word so the rational thing to do is give him the benefit of the doubt. There is a little thing we believe in, in this modern world and that is innocent before proven guilty not the other way around. If it comes to light that he was lying then so be it.