" 
 " i 'm not sherlock holmes , " i said . " i 'm a scientist . " 
 " a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist who 's a scientist
