Advertisement: At most jewelry stores, the person assessing the diamond is the person selling it, so you can see why an assessor might say that a diamond is of higher quality than it really is. ███ ███████ ███ ████████ ████ ██ ███ █████ ███ █████████ ██ ████████ ██████ ███████ ██ █ ████ █████ ████ ██████████ █ ███████ ████ ███ ██████
The advertisement concludes that customers are assured a fair price on diamonds at Gem World. This is because all diamonds sold at Gem World are certified in writing.
The advertisement assumes that diamonds that are certified in writing are assessed by someone other than the person selling them. Moreover, the advertisement assumes that whoever sells the diamond at Gem World isn’t inclined to lie about the diamond’s quality for some other reason. If the salesperson selling the diamond wasn’t obliged to provide the written certification, then they may well lie about the quality of the diamond to secure a higher price.
The reasoning in the advertisement █████ ██ ████ ████████████ ██ █████ ███ ██ ███ █████████ ████ █████
Many jewelry stores █████ ████ ███ █████ ████ ███████ ███████ █████████████ ██ ███ ███████ ██ █████ █████████
The certifications of ████████ ██ ███ █████ ███ ███████ ██ ██████ ████ █████ ██ ██████████ ██ ██████████ █████
The diamonds sold ██ ███ █████ ███ █████████ ██ ██████ ███████ ████ █████ ████ ██ █████ ███████ ███████
The diamond market ██ ██ ████████ ████ ██████ ██ ███ ████ █████████ ████████ ███ ██████ ██ ████████ ██ ███████ ████ ███ ███ ██ ███ █████
The written certifications ██ ████████ ██ ███ █████ ███ ████████ ██ ██ ███████████ ███████ ██ ███ ████████████