Your response should contain at least 3 sentences. Your answer must contain a title, wrapped in double angular brackets, such as <<Understanding the Basics of Quantum Mechanics>>. Include keywords [quantum mechanics, principles, wave function, uncertainty, particle, measurement, observer effect] in the response. At the end of your response, please explicitly add a postscript starting with [P.S.]. Your entire response should be in English, and in all lowercase letters. no capital letters are allowed.
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