There should be no argument that her brain injury is likely to have created an impairment of her higher order neurological functioning. So, it is probable to conclude, that her intellectual capabilities have been seriously diminished. Because of this change, constituents must demand an objective assessment of her intelligence post injury. This could include neuro-psychiatric assessment, intelligence testing. At least a high profile debate is in order. If she had been in almost every profession requiring skill (physician/surgeon, airline pilot, ship captain) this would be a routine requirement.
We can no longer tolerate shielding the mental capacities of public officials’. We have 3 famous cases in our history: Wilson, FDR, and JFK. Wilson had a stroke with its obvious attendant impairments, FDR had cardiomyopathy and TIAs (mini-strokes) which likely was an impediment to negotiations at Yalta, and JFK was dependent on mind altering opioids and tranquilizers because of chronic back pain.
How could you tell?