I often have people repeat what they just said to me because my attention happened to wander. Otherwise, they think that I heard what they were saying only to realize later that I hadn't. I'm also reluctant to ask them to repeat sometimes because of the embarrassment that would cause.
My parents also say that I tend to tell the same story over and over, especially when I'm ranting. I just want to make sure that they heard or saw what I had said, because too often others don't even seem to notice when I talk.
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"Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence." -- Albert Einstein