Tom Edison could have used a honemeister
I came across this diary entry from Thomas Edison which proves intelligence isn't a requirement for keeping a sharp razor.
Menlo Park, NJ
July 13, 1885
"Woke (is there such a word) at 6 o'clock, slipped down the declivity of unconsciousness again until 7. Arose and tried to shave with a razor so dull that every time I scraped my face it looked like I was in the throes of cholera morbus. By shaving often I, to a certain extent, circumvent the diabolical malignity of these razors. If I could get my mind down to details, perhaps could learn to sharpen it, but on the other hand I might cut myself."
Regards - Walt