A more thorough explanation:

Likelihood of confusion is a legal term used in trademark cases. It refers to the possibility that a person's use of a trademark may cause confusion with an already existing trademark. When deciding whether there is a likelihood of confusion, courts consider various factors such as:

• The similarity of the marks in their appearance, sound, and meaning
• The similarity of the goods or services the marks represent
• The similarity of the trade channels
• The circumstances and buyers in the sale of the products
• The popularity of the existing mark
• The number and nature of similar marks used for similar goods or services
• The extent of any actual confusion
• The intention of the party owning a newer mark

The standards for determining whether a trademark creates a likelihood of confusion vary among the circuit courts. Some courts consider it a question of law, while others consider it a question of fact. In either case, the court must determine whether there is a clear mistake in the lower court's decision.

For example, if a company called "Apple" started selling computers, it would likely cause confusion with the existing trademark of "Apple" used by the technology company. This is because the marks are similar in appearance, sound, and meaning, and both companies sell technology products.

Similarly, if a new restaurant opened up called "McRonald's" and used a logo that looked similar to the golden arches of McDonald's, it would likely cause confusion among customers. This is because the marks are similar in appearance and both companies sell fast food.

These examples illustrate how the likelihood of confusion can arise when a new trademark is too similar to an existing one, and how it can negatively impact the original trademark owner's business.