Even if the sales consultants are employed by the store, this is no guarantee that you get impartial advice. Companies run promotions for salespeople as well as consumers: and for retail electronics they can involve substantial gifts, or cash bonuses. For example, if a salesperon gets a $100 bonus this week if they sell 10 SuperGizmos, but not if they sell 10 HyperWhatevers, which do you think they will encourage you to buy! Next week it might be different, and HyperWhatevers will be the favorite.
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How about "Bismuth not stable; Lead now heaviest stable element". (Polonium has no stable isotopes).
Even if the sales consultants are employed by the store, this is no guarantee that you get impartial advice. Companies run promotions for salespeople as well as consumers: and for retail electronics they can involve substantial gifts, or cash bonuses. For example, if a salesperon gets a $100 bonus this week if they sell 10 SuperGizmos, but not if they sell 10 HyperWhatevers, which do you think they will encourage you to buy! Next week it might be different, and HyperWhatevers will be the favorite.