But my kid can read, so they can't possibly be dyslexic!

It is a common misunderstanding that dyslexic people simply can't read, and can't learn to read fluently. However, it is also a common misunderstanding that if a child learns to read at an early age, they can't possibly be dyslexic. Because of this misunderstanding, a child who possesses the capacity to memorize enough sight words and is intelligent enough to quickly synthesize contextual cues are able  to make it seem like they are reading proficiently. Meanwhile, their ability to decode unfamiliar words, struggle to find the right words to express themselves orally or in written language, and  difficulty with various aspects of written expression goes undetected until they reach  second or third grade (or even later).  Even some clinicians who are qualified to conduct dyslexia evaluations believe that if a child has learned to read at an early age, they can't possibly be dyslexic.