Her brain cells must have died at an early age.
Swordmaker's and Kathy's proposed diagnosis for the new IDC-10 addenda:
321.0 SPLAT Liberal Cerebral Defenestration (LCD) or Liberal Acquired Brain Absence (LABA), Complete loss of rationality, cognition, and cerebration due to indiscriminately keeping one's mind so far open that the brain falls out. First and subsequent encounters.
Both of them.