It wasn't for a c and p exam. I have ptsd 70% with memory issues. The first eval was done outside of VA and stated extreme memory issues. 3 years later the VA requested another neuro exam. I stated I had been involved in an ied blast which I was with four others, two are in prison and one is in bad shape also. The last exam was a VA neuro which disputed the findings of the civilian dr. My concentration and memory, anxiety and hypervigilence never stops. I am not even claiming TBI, I was trying to figure out where my memory issues and other items are stemming from. But to call the test invalid, I do not understand because I tried.