The principle of easy discrimination, when a buyer buys a certain brand of goods he needs in the market, he always takes his memory of a certain trademark or the impression it left in his mind as the basis, and this memory and impression is inaccurate or vague, and the buyer usually remembers only some characteristics of the trademark. If two trademarks have the same characteristics, so that ordinary buyers can't distinguish them with ordinary attention, they are similar trademarks. For example, whether the trademarks of household daily necessities are similar should be based on whether the owner can distinguish them with ordinary attention when buying goods. French precedents take this as the standard for identifying trademark similarity.