Can someone have a focal neurologic deficit without that person having any symptoms?

Agnosia: The definition of neurologic deficit is a symptomatic abnormality. In certain cases patients with anosagnosia which is a lack of awareness or a denial of a neurologic defect or illness in general, especially paralysis, on one side of the body. It may be attributable to a lesion in the right parietal lobe. Similarly patients have phantom limb pain or Antons syndrome (not accepting being blind)