Could be flat out lying (you are listening to a sales person whos job is to tell you what you want to hear) or ignorance of the truth (like a mechanic that actually doesnt know what the problem is).
Now im not the last word on mens suits and therefore when i walked into Macy's some months ago (not intending to buy anything) i really ran into a salesman ! Or rather a sales lady. She got me out of there with a suit from Tommy Hilfiger and a blazer from Macy's own club house brand for 350 out the door. I saved a reported 400 bucks !
The tommy suit is nice and I like it. But the blazer has sleeves that are too long. I wanted to buy it and was looking for expert opinion and she said it was fine. Well it was not fine. The sleeves are like 2 inches too long and i looked like an ape !
Well 28 dollars later at a tailors to get them shortened to a proper length they now fit fine.
The sales lady didnt do her job professionally enough and advise me correctly that the sleeves were too long > I liked the jacket and she sold it to me, just like a run of the mill salesman would do. But a pro wouldve done better.
She shouldve been more pro and suggested a better fitting jacket (and bumped me up a notch price wise, i wouldve gone for it).
Now i may still look like an ape wearing it, but at least I don't FEEL like an ape
So long story short (impossible for me) BUYER BEWARE for everything you do. For any product or any service. GEt a second opinion. REad up on what you need and the product reviews, etc.