:: Marah can tell with fair certainty that Sonvek is almost certainly showing signs of nervous exhaustion and sleep deprivation. These would be potential contributing factors to hallucination and might possibly explain his questioning of whether<em>Vanguard</em>is real.<br/><br/>:: Beyond that, there just isn't enough data to speculate on causative factors. He seems to be still trying to maintain composure in the face of whatever is affecting him, but whether that indicates sanity -- whether the something is internally-generated or external -- is impossible to tell.