A doctor's handwriting is classically very sloppy and often implies (correctly) that a doctor, despite years of medical training, is in fact illiterate. A recent study in the New England Journal of Penmanship revealed that 100% of doctors do not know how to write every letter of the alphabet. This explains the widespread occurrence of signatures that look like precursors to the onset of seizures. For this reason, most neurologists recommend continuous EEG monitoring whenever a doctor writes something down.
