My son has high functioning autism or Asperger's. Understanding how we communicate and what our language means was his biggest challenge. This means that trying to understand what he was trying to say was difficult too. Please note that he spoke very clearly. He just had a different way of looking at things.
One day, he was asked where the front of the book was. It took him a long time to figure it out. He finally showed us the paper edge. We asked him why that was the front of the book and he said, "The spine is the back, much the same as it is with us."
Denver, CO