Which of the following factors does NOT contribute to trademark strength?

Trademark strength is primarily determined by how distinctive a mark is and how well it is recognized in the market. A strong trademark typically possesses a high degree of distinctiveness, serving not just as a source identifier, but as a unique symbol that customers can easily associate with specific goods or services.

Distinctiveness refers to the uniqueness of the trademark in terms of its ability to indicate the source of the goods or services. A highly distinctive mark, such as a coined term or a fanciful mark, is deemed strong and worthy of greater protection under trademark law.

Market recognition signifies how well consumers identify a mark with a specific source of goods or services in the marketplace. A trademark that is readily recognized has greater strength, as it indicates solid consumer awareness and loyalty.

Longevity in the market reflects a trademark's established presence and continued use over time, which can bolster its strength by reinforcing consumer associations and recognition.

Descriptiveness, on the other hand, refers to marks that simply describe a characteristic, function, quality, or purpose of the goods or services, and as such, are generally not considered strong trademarks. Such marks are seen as weak because they can fail to indicate the source and can be used by other businesses within the same industry without infringing.