To create your own identity, it is very important to have something which is different from others. Uniqueness is required in every sphere of life and you will be identified by that uniqueness over the years. If you think of a company, a company is identified by its logo. Each and every company has its own unique logo. This is their trademark. 

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Would you accept it if someone uses your creativity without giving proper credit to you? Nobody would tolerate this. This is not only unethical but also illegal. Any tangible creations which come out of human intellect is called Intellectual Property. Any intellectual property which is unique should be properly registered so that no one can abuse your creation. 

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