I know this is a generalization, but I keep reading in various child psychiatric books that certain kids cannot lie, especially if they're low functioning Autistic, etc. My difficult child is ODD, ADHD, and possibly has Aspberger's and he is the consumate liar. The lying doesn't rule out that diagnosis does it? Again, maybe I'm being too absolute but there are certain patterns that I've read about, and I've seen them in your notes, too. I want to know why they can or cannot lie and how their minds work that affect that ability or lack thereof. Thanks in advance for any info.