Manipulation and persuasion both describe the same thing but have different methods of achieving the same result. Manipulation deliberately markets certains aspects of a device or feature to a target audience, leaving out crucial details of the product. On the other hand, persuasion can present a number of facts and “fluff” up the words to make it more appealing, without actually forcing any of the audience to buy their product. I agree with what IbraheemShaikh said above about assessing people’s happiness with the product to determine whether their company used manipulation or persuasion. Usually, when many of the customers end up dissatisfied with the product, then the company most likely used manipulation in order to sell their product. When most of the customers are satisfied, the company most likely used persuasion to sell their product. In marketing, I believe that persuading customers to buy their product is much more common, since companies cannot force customers to buy their product. This allows many more customers to become satisfied with their product and come back buying more objects from their company.