Using derogatory terms such as "mentally deficient" to describe individuals with cognitive disabilities is unacceptable in today's society. There are many alternative terms to use that are respectful and inclusive, such as "intellectually disabled," "developmentally challenged," or "cognitively impaired." These terms focus on the individual's abilities rather than their limitations, and avoid stigmatizing language. It's important to remember that everyone has unique strengths and capabilities, and no one should be defined solely by their disability. By using respectful language, we can foster a more inclusive and understanding society for all individuals.